NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
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
2016-03-08 336-660 0–9 XXXall 10 · 4 holders which blocks → RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC 769H GREENSBORO NC
2016-03-08 361-417 7XXX which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CONCEPCION TX
2016-03-08 365-529 not yet reported which blocks → Distributel 082E Queensville —
2016-03-08 405-594 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2016-03-08 430-303 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C COMMERCE TX
2016-03-08 505-308 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2016-03-08 509-890 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F DEER PARK WA
2016-03-08 517-201 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C LESLIE MI
2016-03-08 517-210 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C POTTERVL MI
2016-03-08 639-361 not yet reported which blocks → Bell Mobility 6574 Assiniboia —
2016-03-08 639-362 not yet reported which blocks → Bell Mobility 6574 Davidson —
2016-03-08 639-363 not yet reported which blocks → Bell Mobility 6574 Grenfell —
2016-03-08 639-364 not yet reported which blocks → Bell Mobility 6574 Indian Head —
2016-03-08 639-365 not yet reported which blocks → Bell Mobility 6574 Moosomin —
2016-03-08 639-366 not yet reported which blocks → Bell Mobility 6574 Southey —
2016-03-08 639-367 not yet reported which blocks → Bell Mobility 6574 Whitewood —
2016-03-08 639-368 not yet reported which blocks → Bell Mobility 6574 Kipling —
2016-03-08 639-421 not yet reported which blocks → Bell Mobility 6574 Wakaw —
2016-03-08 639-422 not yet reported which blocks → Bell Mobility 6574 Watrous —
2016-03-08 639-423 not yet reported which blocks → Bell Mobility 6574 Biggar —
2016-03-08 639-424 not yet reported which blocks → Bell Mobility 6574 Lanigan —
2016-03-08 639-425 not yet reported which blocks → Bell Mobility 6574 Outlook —
2016-03-08 639-426 not yet reported which blocks → Bell Mobility 6574 Rosthern —
2016-03-08 910-807 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NC 638E CASTLEHAYN NC
2016-03-08 971-347 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G PORTLAND OR
2016-03-08 971-370 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 SILVERTON OR
2016-03-08 980-243 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E BESSEMERCY NC
2016-03-07 206-771 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2016-03-07 219-336 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D MICHIGANCY IN
2016-03-07 336-571 0–9 XXXall 10 · 5 holders which blocks → RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC 769H ELKIN NC
2016-03-07 365-654 not yet reported which blocks → Iristel Inc. 154E Markham —
2016-03-07 365-655 not yet reported which blocks → Iristel Inc. 154E Markham —
2016-03-07 480-930 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2016-03-07 505-305 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2016-03-07 518-501 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C SOBETHLEHM NY
2016-03-07 573-430 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLAT RIVER MO
2016-03-07 579-794 not yet reported which blocks → Iristel Inc. 154E St-Jean —
2016-03-07 579-996 not yet reported which blocks → Iristel Inc. 154E St-Lin —
2016-03-07 579-997 not yet reported which blocks → Iristel Inc. 154E St-Hyacinthe —
2016-03-07 579-998 not yet reported which blocks → Iristel Inc. 154E St-Jerome —
2016-03-07 581-803 not yet reported which blocks → Iristel Inc. 154E St-Felicien —
2016-03-07 581-804 not yet reported which blocks → Iristel Inc. 154E St-Tite-des-Caps —
2016-03-07 587-496 not yet reported which blocks → TELUS 8084 Calgary —
2016-03-07 639-396 not yet reported which blocks → Iristel Inc. 154E Rosthern —
2016-03-07 639-533 not yet reported which blocks → Bell Mobility 6574 Prince Albert —
2016-03-07 639-534 not yet reported which blocks → Bell Mobility 6574 Estevan —
2016-03-07 639-535 not yet reported which blocks → Bell Mobility 6574 Humboldt —
2016-03-07 639-536 not yet reported which blocks → Bell Mobility 6574 Lloydminster —
2016-03-07 639-537 not yet reported which blocks → Bell Mobility 6574 Meadow Lake —
2016-03-07 639-538 not yet reported which blocks → Bell Mobility 6574 Moose Jaw —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.