FAA Order JO 7110.66H_National_Beacon_Code_Allocation_Plan__NBCAP__FINAL

05/06/2024 JO 7110.66H c. Paragraph 9, Justification Requirements, subparagraph b, is amended to read: “Terminal, FSS, CERAP, and HCF. Forward requests to the appropriate OSG with supporting documentation, which must include quantifiable justification such as traffic count or projected peaks. The OSG must coordinate with the Standards & Procedures Group at: 9-AJV-P-HQ­ [email protected].” d. Paragraph 9, Justification Requirements, subparagraph c, is amended to read: “NAS Stakeholder, Unique Purpose, and Experimental Activity. Submit a detailed letter to the appropriate local facility or OSG with supporting documentation indicating intended use, safety considerations, duration needed, and impact if not approved. The OSG must coordinate with the Standards & Procedures Group at: [email protected].” e. Appendix A, National Beacon Code Allocation Summary, TBL A-1, is amended as follows: 1203 VFR standard formation flights not in contact with ATC. The lead aircraft should squawk 1203 in lieu of 1200. All other aircraft in the formation should squawk standby. f. Entirety of the document. All instances of the term “nondiscrete” have been changed to read “non-discrete.” 6. Concept. a. The National Beacon Code Allocation Plan (NBCAP) is based upon the concept of discrete beacon code assignments to each Air Route Traffic Control Center (ARTCC). Beacon codes are assigned by the automation system based on whether the flight plan is external (will leave the ARTCC’s airspace) or internal (will remain within a single ARTCC). Each ARTCC should be allocated enough discrete code blocks to allow all aircraft to proceed from departure to destination using the same discrete code. Due to the limited number of available code subsets, traffic volume, and the number of ARTCCs, duplicate assignments are unavoidable. Vigilant analysis is required to minimize the impact of duplicate beacon code assignments. To reduce beacon code reassignments, ARTCC allocations are managed at the national level. b. Terminal, National Airspace System (NAS) Stakeholder, Unique Purpose, or Experimental Activity beacon code assignments are made from the allocations designated in Appendix A and are managed by the appropriate Service Center Operations Support Group (OSG). If additional codes are needed, the Standards & Procedures Group will assist the OSGs in determining a solution. c. Every effort will be made to consider and comply with International Civil Aviation Organization (ICAO) beacon code assignment procedures when appropriate. 7. Responsibilities. a. The Standards & Procedures Group must: 2

05/06/2024 JO 7110.66H (1) Make and manage all national beacon code allocations. (2) Make all ARTCC beacon code assignments. (3) Make all Service Area code assignments beyond those delegated in this order. (4) Review Service Area supplements and audit local beacon code assignments as necessary. (5) Respond to Service Center requests to support terminal, industry, unique purpose, or experimental activity. (6) When necessary, coordinate beacon code assignments with international air navigation service providers with assistance from the appropriate OSG. (7) Work with the OSGs to coordinate beacon code assignments with non-FAA agencies such as DoD. b. The Eastern, Central, and Western Service Center OSGs must: (1) Assist the Standards & Procedures Group with the execution of this order. (2) Manage all Service Area beacon code assignments delegated in this order. (3) Work with local ARTCCs and the Standards & Procedures Group to manage internal beacon code assignments in accordance with this document. (4) Develop a Service Area supplement to this order that specifies the designated use of beacon code assignments made within the Service Area. The supplement must include a current record, and the specific use or function of each, of all Instrument Flight Rules (IFR) and Visual Flight Rules (VFR) codes, code blocks, or code subsets assigned to each terminal or flight service facility, or for each unique purpose. For those Service Areas with facilities that contain or are adjacent to an Air Defense Identification Zone (ADIZ), include codes assigned for identifying aircraft on Defense Visual Flight Rules (DVFR) flight plans. Additionally, document any restrictions, agreements on beacon code assignments, and adaptations in the supplement. Update the Service Area supplement as needed and forward a copy to the Standards & Procedures Group for review. (5) Coordinate with the other two OSGs to prevent beacon code assignment conflicts between adjacent terminal and flight service facilities. For those Service Areas with facilities that are adjacent to international boundaries, assist the Standards & Procedures Group to ensure coordination with adjacent international facilities (such as facilities in Canada, Mexico, Cuba, and the Bahamas) is accomplished. c. Air Traffic Control (ATC) facilities must: 3

05/06/2024 JO 7110.66H (1) Ensure that beacon code usage is in compliance with the beacon code assignments outlined in this document and in the Service Area supplements. (2) Adjust appropriate computer parameters to optimize code usage. (3) Forward to their OSG all requests for additional code assignments. Include the justification rationale as required by paragraph 9 of this order. Ensure that requests for codes dedicated to a specific function or to be used for a unique purpose are approved sparingly, since this will limit the overall number of codes available for general use. Examples of unique purposes include, but are not limited to, VFR traffic penetrating Class B airspace and practice instrument approaches. 8. Code Assignments. a. ARTCC. The Standards & Procedures Group must assign internal and external primary, secondary, and tertiary ARTCC code blocks. b. Terminal, Flight Service Station (FSS), Combined Center/Radar Approach Control (CERAP), Honolulu Control Facility (HCF), NAS Stakeholder, Unique Purpose, or Experimental Activities. Codes must be assigned by the appropriate OSG and documented in the Service Area supplement. c. Military. Codes are reserved/allocated by agreement. Additional DoD requirements must be forwarded to the appropriate directorate for consideration. d. Full code blocks. These are designated in the appendices to this document by the non- discrete base code of that block; for example, “2600” indicates codes 2601 through 2677. The non-discrete code, 2600 in this example, will normally not be assigned. Code 0000 must never be assigned by ATC. Where partial blocks are allocated, the actual range of codes will be listed. e. DVFR. Special procedures are required for VFR flights into, out of, or within the United States ADIZ. Code assignments are made by FSS when a flight plan is activated for a VFR flight that will fly into, out of, or within the ADIZ. (See FAA Order JO 7110.10, Flight Services, Chapter 6, Section 2, Flight Plan Handling, and Chapter 6, Section 5, Customs Notifications and ADIZ Requirements.) 9. Justification Requirements. a. ARTCCs. Submit all requests for additional beacon codes or allocation adjustments through the appropriate service center OSG to the Standards & Procedures Group. The OSG must coordinate with the Standards & Procedures Group at 9-AJV-P-HQ­ [email protected]. Justifications must include full rationale, with traffic counts, specific cases/issues, and any other potential impacts on the NAS. b. Terminal, FSS, CERAP and HCF. Forward requests to the appropriate OSG with supporting documentation, which must include quantifiable justification such as traffic count or 4

05/06/2024 JO 7110.66H projected peaks. The OSG must coordinate with the Standards & Procedures Group at 9-AJV-P­ [email protected]. c. NAS Stakeholder, Unique Purpose, and Experimental Activity. Submit a detailed letter to the appropriate local facility or OSG with supporting documentation indicating intended use, safety considerations, duration needed, and impact if not approved. The OSG must coordinate with the Standards & Procedures Group at [email protected]. For Michael R. Beckles Director, Policy, AJV-P Air Traffic Organization 5

05/06/2024 JO 7110.66H Appendix A Appendix A. National Beacon Code Allocation Summary TBL A-1 National Beacon Code Allocation Summary NOTE– Unless otherwise noted, single code entries in TBL A-1 that end in “00” refer to only that non-discrete code, and not the entire Code Block. Code, Block, or Subset Allocation/Reservation 0000 Used by certain Universal Access Transmitter Automatic Dependent Surveillance-Broadcast (UAT ADS-B) units upon power-up until the aircraft enters beacon interrogation surveillance coverage. 0100, 0200, 0300, 0400 Code blocks allocated to Service Area Operations for use by Terminal/CERAP, NAS Stakeholder, Unique Purpose, and Experimental activities. 1000 Used exclusively by ADS-B aircraft to inhibit Mode 3A transmit. 1200 Visual Flight Rules (VFR) aircraft that may or may not be in contact with ATC. 1201 VFR aircraft operating in the Los Angeles Special Flight Rules Area (SFRA), in accordance with 14 CFR §§ 93.93 and 93.95. 1202 VFR gliders that may or may not be in contact with ATC. 1203 VFR standard formation flights not in contact with ATC. The lead aircraft should squawk 1203 in lieu of 1200. All other aircraft in the formation should squawk standby. 1205 (1) VFR Helicopters within the Los Angeles region that may or may not be in contact with ATC; or (2) VFR aircraft departing the DC SFRA fringe airports, in accordance with 14 CFR § 93.345. 1206 Reserved for use by VFR Public Service helicopters within the Los Angeles region that may or may not be in contact with ATC. 1207–1233, 1235–1254, 1256–1272 Discrete 1200 series code subsets allocated to Service Area Operations for assignment to air traffic facilities as needed for Unique Purpose VFR Programs (e.g., DVFR, tour operators). 1234 VFR aircraft conducting pattern work at airports in the DC SFRA, in accordance with 14 CFR § 93.339. 1255 Firefighting aircraft. 1273–1275 Calibration Performance Monitoring Equipment (CPME), MSSR Remote System Monitor (MRSM), and PARROT transponders. 1276 Air Defense Identification Zone (ADIZ) penetration when unable to establish communication with ATC or aeronautical facility. 1277 Designated Search and Rescue (SAR) aircraft. 4400–4433 Reserved/allocated. For information on the use of this code subset, contact [email protected]. 4434–4437 Weather reconnaissance, as appropriate. 4440–4452 Reserved/allocated. For information on the use of this code subset, contact [email protected]. A-1

05/06/2024 JO 7110.66H Appendix A Code, Block, or Subset Allocation/Reservation 4453 High balloon operations—National Scientific Balloon Facility, Palestine, TX; and other providers, some in international operations. 4454–4477 Reserved/allocated. For information on the use of this code subset, contact [email protected]. 5100, 5200 Code blocks allocated to Potomac TRACON (PCT) for use in the DC SFRA and Flight Restricted Zone (FRZ). 5000, 5400, 6100, 6400 Reserved/allocated. For information on the use of these code blocks, contact [email protected]. 7400 Reserved for an unmanned aircraft experiencing a lost link situation. 7500 Hijack/Unlawful Interference—reserved internationally. 7600 Communication Failure—reserved internationally. 7700 Emergency—reserved internationally. 7501–7577, 7601–7607, 7701–7707, 7777 Reserved/allocated. For information on the use of these code subsets, contact [email protected]. 0500, 0600, 0700, 1000, 1100, 1300, 1400, 1500, 1600, 1700, 2000*, 2100, 2200, 2300, 2400, 2500, 2600, 2700, 3000, 3100, 3200, 3300, 3400, 3500, 3600, 3700, 4000, 4100, 5600, 5700, 6000, 6200, 6300, 6500, 6600, 6700, 7000, 7100, 7200, 7300, 7401–7477, 7610–7676, 7710–7776 External ARTCC code blocks and code subsets, consisting of the discrete codes of the blocks except for the non-discrete code of the first primary block, which is used as the ARTCC’s non-discrete external code if all discrete external codes are assigned. 2000* – for use in oceanic airspace, unless another code is assigned by ATC. 0000, 4200, 4300, 4500, 4600, 4700, 5100, 5200, 5300, 5500 Internal ARTCC code blocks, consisting of the discrete codes of the blocks except for the non-discrete code of the first primary block, which is used as the ARTCC’s non-discrete internal code if all discrete internal codes are assigned. Internal ARTCC code blocks are assigned by the Policy Directorate, Standards & Procedures Group, ATC Procedures (En Route) Team. Exceptions for operational need must be approved by the Standards & Procedures Group, AJV-P3. A-2

05/06/2024 JO 7110.66H Appendix B Appendix B. National Beacon Code Allocation Details TBL B-1 ARTCC Code Categories I Internal Departures E External Departures M Military S Special Use TBL B-2 ARTCC Computer Adaptation Sequence P Primary Code Block or Subset S Secondary Code Block or Subset T Tertiary Code Block or Subset (AA-n) Adaptation Sequence (Priority) TBL B-3 ARTCC Assignments ARTCC Code Thru Code Priority KZAK 1100 ATOP KZWY 1001 – 1077 ATOP ZAB 0700 EP-1 ZAB 2600 EP-2 ZAB 1500 ES-1 ZAB 1600 ES-2 ZAB 4100 ES-3 ZAB 3001 – 3020 ET-1 ZAB 3101 – 3134 ET-2 ZAB 3501 – 3515 ET-3 ZAB 5601 – 5621 ET-4 ZAB 6024 – 6047 ET-5 ZAB 4200 IP-1 ZAB 4300 IP-2 ZAB 5500 IS-1 ZAN 3400 E ZAN 4100 E ZAN 5700 E ZAN 7200 E ZAN 4000 ES ZAN 5600 ES ZAN 2200 I ZAN 2300 I ZAN 4200 I ZAN 4500 I ZAN 4600 I ZAN 4700 I ZAN 5100 I ZAN 5200 I ZAN 3100 IS B-1

05/06/2024 JO 7110.66H Appendix B ARTCC Code Thru Code Priority ZAN 3500 IS ZAN 5300 M ZAN 5500 M ZAU 1300 EP-1 ZAU 3100 EP-2 ZAU 6200 EP-3 ZAU 6500 EP-4 ZAU 3200 ES-1 ZAU 3500 ES-2 ZAU 5600 ES-3 ZAU 7200 ES-4 ZAU 0500 ET-1 ZAU 2200 ET-2 ZAU 4300 IP-1 ZAU 5300 IP-2 ZAU 0001 – 0007 IS-1 ZAU 0011 – 0017 IS-2 ZAU 0021 – 0027 IS-3 ZAU 0031 – 0037 IS-4 ZAU 0041 – 0047 IS-5 ZAU 0051 – 0057 IS-6 ZAU 0061 – 0067 IS-7 ZAU 0071 – 0077 IS-8 ZAU 4700 IS-9 ZAU 5500 IS-10 ZBW 3400 EP-1 ZBW 3500 EP-2 ZBW 1300 ES-1 ZBW 1400 ES-2 ZBW 2000 – 2007 ES-3 ZBW 7300 ES-4 ZBW 2400 ET-1 ZBW 7000 ET-2 ZBW 5300 IP-1 ZBW 0001 – 0077 IS-1 ZBW 4600 IS-2 ZBW 4700 IS-3 ZBW 5500 IS-4 ZDC 0500 EP-1 ZDC 2100 EP-2 ZDC 2400 EP-3 ZDC 3600 EP-4 ZDC 5600 EP-5 ZDC 7000 EP-6 ZDC 1300 ES-1 ZDC 6200 ES-2 ZDC 6500 ES-3 ZDC 3500 ET-1 ZDC 3700 ET-2 ZDC 4600 IP-1 ZDC 5300 IP-2 ZDC 0001 – 0077 IS-1 B-2

05/06/2024 JO 7110.66H Appendix B ARTCC Code Thru Code Priority ZDC 4700 IS-2 ZDC 5500 IS-3 ZDV 1400 EP-1 ZDV 0600 ES-1 ZDV 2700 ES-2 ZDV 3700 ES-3 ZDV 6500 ES-4 ZDV 2212 – 2235 ET-1 ZDV 3333 – 3377 ET-2 ZDV 3401 – 3427 ET-3 ZDV 5622 – 5642 ET-4 ZDV 6644 – 6655 ET-5 ZDV 7441 – 7453 ET-6 ZDV 5100 IP-1 ZDV 0001 – 0077 IS-1 ZDV 4300 IS-2 ZDV 5500 IS-3 ZFW 0500 EP-1 ZFW 2200 EP-2 ZFW 2300 EP-3 ZFW 3400 ES-1 ZFW 3600 ES-2 ZFW 6200 ES-3 ZFW 0613 – 0677 ET-1 ZFW 3021 – 3077 ET-2 ZFW 3241 – 3264 ET-3 ZFW 7041 – 7077 ET-4 ZFW 5100 IP-1 ZFW 5200 IP-2 ZFW 4500 IS-1 ZFW 5300 IS-2 ZHU 2400 EP-1 ZHU 2500 EP-2 ZHU 2700 ES-1 ZHU 4000 ES-2 ZHU 7200 ES-3 ZHU 7300 ES-4 ZHU 7401 – 7477 ES-5 ZHU 6600 ET-1 ZHU 6700 ET-2 ZHU 4500 IP-1 ZHU 4600 IP-2 ZHU 4200 IS-1 ZHU 4700 IS-2 ZHU 5200 IS-3 ZHU 0001 – 0077 IT-1 ZHU 5101 – 5127 IT-2 ZHU 5146 – 5177 IT-3 ZID 4000 EP-1 ZID 6600 EP-2 ZID 6700 EP-3 ZID 1400 ES-1 B-3

05/06/2024 JO 7110.66H Appendix B ARTCC Code Thru Code Priority ZID 3400 ES-2 ZID 3700 ES-3 ZID 7300 ES-4 ZID 2601 – 2642 ET-1 ZID 2701 – 2735 ET-2 ZID 3001 – 3042 ET-3 ZID 4200 IP-1 ZID 4500 IP-2 ZID 5500 IS-1 ZJX 0700 EP-1 ZJX 1001 – 1077 EP-2 ZJX 2600 EP-3 ZJX 1500 ES-1 ZJX 1600 ES-2 ZJX 3000 ES-3 ZJX 3200 ES-4 ZJX 6200 ES-5 ZJX 7300 ES-6 ZJX 2700 ET-1 ZJX 6500 ET-2 ZJX 6700 ET-3 ZJX 7610 – 7676 ET-4 ZJX 7710 – 7776 ET-5 ZJX 3400 IP-1 ZJX 4200 IP-2 ZJX 5500 IP-3 ZJX 7401 – 7477 IS-1 ZJX 4300 IT-1 ZKC 1100 EP-1 ZKC 1700 EP-2 ZKC 2100 EP-3 ZKC 2500 ES-1 ZKC 5700 ES-2 ZKC 2001 – 2020 ET-1 ZKC 3301 – 3311 ET-2 ZKC 6001 – 6023 ET-3 ZKC 7101 – 7120 ET-4 ZKC 7401 – 7440 ET-5 ZKC 4600 IP-1 ZKC 4700 IP-2 ZKC 5200 IS-1 ZLA 1000 EP-1 ZLA 7200 EP-2 ZLA 7300 EP-3 ZLA 1300 ES-1 ZLA 2000 ES-2 ZLA 6700 ES-3 ZLA 2401 – 2477 ET-1 ZLA 7610 – 7675 ET-2 ZLA 7710 – 7776 ET-3 ZLA 4600 IP-1 ZLA 4700 IP-2 B-4

05/06/2024 JO 7110.66H Appendix B ARTCC Code Thru Code Priority ZLA 5100 IS-1 ZLA 5300 IS-2 ZLC 6000 EP-1 ZLC 0500 ES-1 ZLC 3100 ES-2 ZLC 4000 ES-3 ZLC 0701 – 0710 ET-1 ZLC 0716 – 0720 ET-2 ZLC 0726 – 0730 ET-3 ZLC 2201 – 2211 ET-4 ZLC 2301 – 2332 ET-5 ZLC 2501 – 2512 ET-6 ZLC 4100 ET-7 ZLC 5601 – 5611 ET-8 ZLC 6201 – 6211 ET-9 ZLC 7401 – 7411 ET-10 ZLC 7610 – 7676 ET-11 ZLC 7710 – 7776 ET-12 ZLC 4300 IP-1 ZLC 4200 IS-1 ZLC 5200 IS-2 ZLC 5300 IS-3 ZMA 1400 EP-1 ZMA 3600 EP-2 ZMA 3700 EP-3 ZMA 7401 – 7477 EP-4 ZMA 1100 ES-1 ZMA 1300 ES-2 ZMA 2100 ES-3 ZMA 2300 ES-4 ZMA 3300 ES-5 ZMA 3500 ES-6 ZMA 5700 ES-7 ZMA 6000 ES-8 ZMA 6600 ES-9 ZMA 0500 ET-1 ZMA 2200 ET-2 ZMA 5600 ET-3 ZMA 7000 ET-4 ZMA 7100 ET-5 ZMA 7610 – 7676 ET-6 ZMA 7710 – 7776 ET-7 ZMA 0000 IP-1 ZMA 4500 IP-2 ZMA 4600 IP-3 ZMA 4700 IP-4 ZMA 4200 IS-1 ZMA 5100 IS-2 ZMA 5300 IS-3 ZME 1500 EP-1 ZME 1600 EP-2 ZME 5600 EP-3 B-5

05/06/2024 JO 7110.66H Appendix B ARTCC Code Thru Code Priority ZME 0700 ES-1 ZME 1001 – 1077 ES-2 ZME 1300 ES-3 ZME 7610 – 7676 ET-1 ZME 7710 – 7776 ET-2 ZME 4300 IP-1 ZME 5500 IP-2 ZME 4500 IS-1 ZME 5300 IS-2 ZMP 2400 EP-1 ZMP 2600 EP-2 ZMP 3600 EP-3 ZMP 1600 ES-1 ZMP 3000 ES-2 ZMP 7000 ES-3 ZMP 1501 – 1532 ET-1 ZMP 3312 – 3332 ET-2 ZMP 6700 ET-3 ZMP 4200 IP-1 ZMP 4500 IP-2 ZMP 4600 IS-1 ZMP 5200 IS-2 ZNY 1100 EP-1 ZNY 1500 EP-2 ZNY 1600 EP-3 ZNY 1700 EP-4 ZNY 2600 EP-5 ZNY 2700 EP-6 ZNY 3000 EP-7 ZNY 3300 EP-8 ZNY 7100 EP-9 ZNY 1001 – 1077 ES-1 ZNY 2200 ES-2 ZNY 2300 ES-3 ZNY 4000 ES-4 ZNY 6601 – 6666 ES-5 ZNY 6725 – 6777 ET-1 ZNY 7610 – 7676 ET-2 ZNY 7710 – 7776 ET-3 ZNY 4200 IP-1 ZNY 4500 IS-1 ZNY 4600 IS-2 ZOA 3200 EP-1 ZOA 3300 EP-2 ZOA 1700 ES-1 ZOA 3600 ES-2 ZOA 3700 ES-3 ZOA 6300 ES-4 ZOA 0601 – 0647 ET-1 ZOA 2212 – 2235 ET-2 ZOA 3001 – 3020 ET-3 ZOA 7441 – 7464 ET-4 B-6

05/06/2024 JO 7110.66H Appendix B ARTCC Code Thru Code Priority ZOA 4200 IP-1 ZOA 4500 IP-2 ZOA 4300 IS-1 ZOA 5500 IS-2 ZOA 7000 IS-3 ZOB 4100 EP-1 ZOB 5700 EP-2 ZOB 7401 – 7477 EP-3 ZOB 1001 – 1077 ES-1 ZOB 2100 ES-2 ZOB 2300 ES-3 ZOB 2500 ES-4 ZOB 6000 ES-5 ZOB 7200 ES-6 ZOB 0500 ET-1 ZOB 0600 ET-2 ZOB 0700 ET-3 ZOB 6300 ET-4 ZOB 5100 IP-1 ZOB 5200 IP-2 ZOB 4500 IS-1 ZSE 3500 EP-1 ZSE 6600 EP-2 ZSE 1500 ES-1 ZSE 1600 ES-2 ZSE 0650 – 0677 ET-1 ZSE 2236 – 2277 ET-2 ZSE 3430 – 3477 ET-3 ZSE 7412 – 7477 ET-4 ZSE 4600 IP-1 ZSE 4700 IP-2 ZSE 5100 IS-1 ZSE 5200 IS-2 ZTL 2000 EP-1 ZTL 2500 EP-2 ZTL 3100 EP-3 ZTL 7100 EP-4 ZTL 1100 ES-1 ZTL 1700 ES-2 ZTL 2200 ES-3 ZTL 3300 ES-4 ZTL 3500 ES-5 ZTL 4134 – 4177 ES-6 ZTL 5700 ES-7 ZTL 6000 ES-8 ZTL 7200 ES-9 ZTL 5100 IP-1 ZTL 5200 IP-2 ZTL 2600 IS-1 ZTL 4700 IS-2 ZTL 5300 IS-3 B-7

05/06/2024 JO 7110.66H Appendix C Appendix C. Administrative Information 1. Distribution. This order is distributed to select offices in Washington Headquarters, Service Area Directors, the William J. Hughes Technical Center, the Mike Monroney Aeronautical Center, all air traffic control facilities, and all flight standards and international aviation field offices. 2. Definitions. a. Beacon code assignment. Actual distribution of specific codes from within the National Beacon Code Allocation Plan to specific facilities and/or special activities as defined in the appendices to this document. b. Beacon code set. Comprised of four octal digits in which the decimal numbers "8" and "9" are not used. There are 4096 possible codes (0000–7777). c. Code block. Defined by the first two octal digits of the code (e.g., 00##, 12##). There are 64 code blocks. Any code block described in this order by the non-discrete code ending in “00” (i.e., 2100, 1000) refers to the entire block (e.g., 2101–2177 or 1001–1077). d. Code subset. Series of discrete beacon codes within a code block. It is described by the lowest and highest number in the subset (e.g., “2110–2120” = 9 discrete codes: 2110, 2111, 2112, 2113, 2114, 2115, 2116, 2117, and 2120). e. Non-discrete codes. Codes that end in “00”. There are 64 non-discrete codes. Non- discrete codes are not normally used but may be assigned by the Standards & Procedures Group. Code 0000 must never be assigned by ATC. f. Discrete codes. Codes that end in other than “00” (e.g., ##01, ##43). There are 4032 total discrete codes, with 63 in every code block. g. Computer assigned code. A beacon code assigned to a specific flight plan as the result of a program function or a controller message input. h. Defense Visual Flight Rules (DVFR). Procedures governing the operation of aircraft flying VFR through or within an Air Defense Identification Zone (ADIZ). i. External codes. Beacon codes reserved for computer assignment to a flight plan with one or more route segments not contained within a single domestic ARTCC’s airspace. j. Internal codes. Beacon codes reserved for computer assignment to a flight plan where all route segments are contained in a single domestic ARTCC’s airspace. C-1

05/06/2024 JO 7110.66H Appendix C k. Primary codes. Code blocks or code subsets in an ARTCC’s computer from which code assignments are first attempted. Primary code blocks are adapted for internal and external flight plans. l. Secondary codes. Code blocks or code subsets in an ARTCC’s computer from which code assignments are attempted when all discrete codes in the primary code blocks have been assigned. Secondary code blocks are adapted for internal and external flight plans. m. Tertiary codes. Code blocks or code subsets in an ARTCC's computer from which code assignments are attempted when all discrete codes in the primary and secondary code blocks have been assigned. Tertiary code blocks are adapted for internal and external flight plans. n. Service Area Beacon Code Supplement. Document maintained by service center specialists that documents the assignment of beacon codes to facilities other than ARTCCs (TRACONs, towers, military units, special use, etc.). 3. Suggestions for Improvements. Please forward all comments on deficiencies, clarifications, or improvements regarding the contents of this order to the AJV-P Correspondence Mailbox at 9­ [email protected]. Your suggestions are welcome. FAA Form 1320-19, Directive Feedback Information, is located in Appendix D of this order for your convenience. 4. Records Management. Refer to FAA Order 0000.1, FAA Standard Subject Classification System; FAA Order 1350.14, Records Management; or your office Records Management Officer (RMO)/Directives Management Officer (DMO) for guidance regarding retention or disposition of records. C-2

05/06/2024 JO 7110.66H Appendix D Appendix D. Directive Feedback Information Directive Feedback Information Please submit any written comments or recommendation for improving this directive, or suggest new items or subjects to be added to it. Also, if you find an error, please tell us about it. Subject: Order JO 7110.66H, National Beacon Code Allocation Plan (NBCAP) To: [email protected] (Please mark all appropriate line items) ☐ An error (procedural or typographical) has been noted in paragraph _______ on page _______. ☐ Recommend paragraph _______ on page _______ be changed as follows: (attach separate sheet if necessary) ☐ In a future change to this order, please include coverage on the following subject: (briefly describe what you want added.) ☐ Other comments: ☐ I would like to discuss the above. Please contact me. Submitted by: __________________________________ Date: __________________ Telephone Number: __________________ Routing Symbol: _________________ FAA Form 1320-19 (08/21) Supersedes Previous Edition D-1