NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2019-09-04 343-588 not yet reported which blocks → Rogers Communications Canada Inc. 571G Ottawa-Hull —
2019-09-04 365-550 not yet reported which blocks → Rogers Communications Canada Inc. 571G Richmond Hill —
2019-09-04 365-551 not yet reported which blocks → Rogers Communications Canada Inc. 571G Schomberg —
2019-09-04 365-552 not yet reported which blocks → Rogers Communications Canada Inc. 571G Stouffville —
2019-09-04 365-553 not yet reported which blocks → Rogers Communications Canada Inc. 571G Oak Ridges —
2019-09-04 365-633 not yet reported which blocks → Rogers Communications Canada Inc. 571G Oshawa —
2019-09-04 365-733 not yet reported which blocks → Rogers Communications Canada Inc. 571G Palgrave —
2019-09-04 365-933 not yet reported which blocks → Rogers Communications Canada Inc. 571G Queensville —
2019-09-04 548-282 not yet reported which blocks → Rogers Communications Canada Inc. 571G St. George —
2019-09-04 548-383 not yet reported which blocks → Rogers Communications Canada Inc. 571G Shakespeare —
2019-09-04 548-877 not yet reported which blocks → Rogers Communications Canada Inc. 571G Owen Sound —
2019-09-04 548-899 not yet reported which blocks → Rogers Communications Canada Inc. 571G Paris —
2019-09-04 786-706 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C MIAMI FL
2019-09-03 225-877 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J BATONROUGE LA
2019-09-03 302-532 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF DELAWARE, LLC - DE 349F ANGOLA DE
2019-09-03 365-233 not yet reported which blocks → Rogers Communications Canada Inc. 571G Mount Albert —
2019-09-03 365-322 not yet reported which blocks → Rogers Communications Canada Inc. 571G King City —
2019-09-03 365-337 not yet reported which blocks → Rogers Communications Canada Inc. 571G Newmarket —
2019-09-03 365-339 not yet reported which blocks → Rogers Communications Canada Inc. 571G Nobleton —
2019-09-03 365-622 not yet reported which blocks → Rogers Communications Canada Inc. 571G Kleinburg —
2019-09-03 365-722 not yet reported which blocks → Rogers Communications Canada Inc. 571G Malton —
2019-09-03 365-899 not yet reported which blocks → Rogers Communications Canada Inc. 571G Markham —
2019-09-03 365-922 not yet reported which blocks → Rogers Communications Canada Inc. 571G Maple —
2019-09-03 425-439 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BOTHELL WA
2019-09-03 469-690 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2019-09-03 470-516 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF GEORGIA, LLC - GA 909E SENOIA GA
2019-09-03 470-517 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF GEORGIA, LLC - GA 909E VILLA RICA GA
2019-09-03 539-236 0XXX6XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C INOLA OK
2019-09-03 548-866 not yet reported which blocks → Rogers Communications Canada Inc. 571G London —
2019-09-03 548-889 not yet reported which blocks → Rogers Communications Canada Inc. 571G Kitchener-Waterloo —
2019-09-03 606-800 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H STONE KY
2019-09-03 636-637 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FSSCRSTLCY MO
2019-09-03 667-271 0XXX1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J SALISBURY MD
2019-09-03 815-706 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J ROCKFORD IL
2019-09-03 862-344 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRANKLINBO NJ
2019-09-03 907-531 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D ANCHORAGE AK
2019-09-03 912-416 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF GEORGIA, LLC - GA 909E JESUP GA
2019-08-30 240-656 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDERICK MD
2019-08-30 260-400 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H POE HOAGLD IN
2019-08-30 365-229 not yet reported which blocks → Rogers Communications Canada Inc. 571G Keswick —
2019-08-30 548-668 not yet reported which blocks → Rogers Communications Canada Inc. 571G Hespeler —
2019-08-30 815-613 5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DIXON IL
2019-08-29 208-551 0–9 XXXall 10 · 4 holders which blocks → TDS METROCOM, LLC 520K COERDALENE ID
2019-08-29 470-622 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA NE GA
2019-08-29 515-466 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - IA 221F WHITTEMORE IA
2019-08-29 516-788 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2019-08-29 563-281 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - IA 221F MUSCATINE IA
2019-08-29 639-384 not yet reported which blocks → Bell Mobility 6574 Saskatoon —
2019-08-29 641-334 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IA 221F ROSE HILL IA
2019-08-29 641-461 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → HD CARRIER LLC 321J CHARLES CY IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.