NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2011-04-27 240-600 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2011-04-27 318-400 0XXX which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 SHREVEPORT LA
2011-04-27 573-534 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C BONNETERRE MO
2011-04-27 616-312 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
2011-04-27 647-750 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-751 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-752 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-753 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-754 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-755 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-970 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-971 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-972 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-973 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 647-974 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2011-04-27 681-205 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRLSTNZN1 WV
2011-04-27 706-804 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E HEPHZIBAH GA
2011-04-27 832-737 0–9 XXXall 10 · 6 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 KEMAH TX
2011-04-26 309-300 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SOUTHPEKIN IL
2011-04-26 980-263 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NC 638E CHARLOTTE NC
2011-04-25 479-800 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FAYETTEVL AR
2011-04-25 803-885 0–9 XXXwhole prefix which blocks → FTC DIVERSIFIED SERVICES, INC. 4255 SUMTER SC
2011-04-25 862-227 0–9 XXXall 10 · 6 holders which blocks → XTEL COMMUNICATIONS, INC. 854D NEWARK NJ
2011-04-25 956-998 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WESLACO TX
2011-04-22 323-425 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2011-04-22 323-427 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2011-04-22 415-858 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NOVATO CA
2011-04-22 651-243 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D NORTH BRCH MN
2011-04-22 909-927 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D CHINO CA
2011-04-21 208-719 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 TELECOM OF IDAHO, LLC - ID 7511 HAYDENLAKE ID
2011-04-21 210-243 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2011-04-21 404-919 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA GA
2011-04-21 417-315 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 SPRINGFLD MO
2011-04-21 520-288 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2011-04-21 647-447 not yet reported which blocks → Videotron Ltd. 383F Toronto —
2011-04-21 647-648 not yet reported which blocks → Videotron Ltd. 383F Toronto —
2011-04-21 647-677 not yet reported which blocks → Videotron Ltd. 383F Toronto —
2011-04-21 706-445 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 WARRENTON GA
2011-04-21 720-464 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2011-04-21 774-223 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BROCKTON MA
2011-04-21 774-331 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ATTLEBORO MA
2011-04-21 774-420 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WORCESTER MA
2011-04-21 872-223 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-04-21 918-892 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2011-04-20 305-414 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KEYS FL
2011-04-20 424-273 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 W ANGELES CA
2011-04-20 432-299 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C FTSTOCKTON TX
2011-04-20 469-800 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2011-04-20 512-265 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BURNET TX
2011-04-20 580-350 0–9 XXXall 10 · 6 holders which blocks → WICHITA ONLINE, INC. - OK 258F LAWTON OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.