NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2013-12-12 870-303 0XXX3XXX7XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAZEN AR
2013-12-12 901-801 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2013-12-11 209-353 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MODESTO CA
2013-12-11 226-513 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Jarvis —
2013-12-11 226-514 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 8377 Simcoe —
2013-12-11 229-342 not yet reported which blocks → CITY OF THOMASVILLE 6145 DOERUN GA
2013-12-11 406-800 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MT 453F BRIDGER MT
2013-12-11 469-712 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCKINNEY TX
2013-12-11 505-600 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2013-12-10 289-463 not yet reported which blocks → ISP Telecom Inc. 4727 Nobleton —
2013-12-10 336-715 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E JULIAN NC
2013-12-10 385-444 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2013-12-10 385-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E SPANIHFORK UT
2013-12-10 587-583 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2013-12-10 587-584 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2013-12-10 725-222 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2013-12-10 725-333 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2013-12-10 819-957 not yet reported which blocks → Comwave Networks 160G Ottawa-Hull —
2013-12-09 208-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - ID 689F BOISE ID
2013-12-09 424-341 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CULVERCITY CA
2013-12-09 510-736 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HAYWARD CA
2013-12-09 559-396 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2013-12-09 661-447 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BKFD MAIN CA
2013-12-09 724-332 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 BUTLER PA
2013-12-09 774-708 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MILLBURY MA
2013-12-09 813-616 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPAWST FL
2013-12-06 343-688 not yet reported which blocks → Comwave Networks 160G Ottawa-Hull —
2013-12-06 343-689 not yet reported which blocks → Comwave Networks 160G Orleans —
2013-12-06 343-690 not yet reported which blocks → Comwave Networks 160G Kanata-Stittsville —
2013-12-06 819-901 not yet reported which blocks → Comwave Networks 160G Fort-Coulonge —
2013-12-06 819-902 not yet reported which blocks → Comwave Networks 160G Gracefield —
2013-12-06 819-906 not yet reported which blocks → Comwave Networks 160G Grand-Remous —
2013-12-06 819-972 not yet reported which blocks → Comwave Networks 160G Kazabazua —
2013-12-06 819-973 not yet reported which blocks → Comwave Networks 160G Maniwaki —
2013-12-05 307-206 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LANDER WY
2013-12-05 470-230 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2013-12-05 612-800 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MINNESOTA, LLC - MN 107F TWINCITIES MN
2013-12-05 786-641 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2013-12-05 832-939 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SUGAR LAND TX
2013-12-05 901-520 0–9 XXXall 10 · 3 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L MILLINGTON TN
2013-12-05 901-612 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 MEMPHIS TN
2013-12-05 929-477 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NWYRCYZN04 NY
2013-12-05 954-613 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C HOLLYWOOD FL
2013-12-04 204-387 not yet reported which blocks → MTS Inc. 8088 Dominion City —
2013-12-04 204-518 not yet reported which blocks → MTS Inc. 8088 Swan River —
2013-12-04 204-547 not yet reported which blocks → MTS Inc. 8088 Dauphin —
2013-12-04 204-549 not yet reported which blocks → MTS Inc. 8088 Selkirk —
2013-12-04 204-550 not yet reported which blocks → MTS Inc. 8088 Thompson —
2013-12-04 204-551 not yet reported which blocks → MTS Inc. 8088 Melita —
2013-12-04 204-561 not yet reported which blocks → MTS Inc. 8088 Morris —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.