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
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.