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
2016-12-05 551-278 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H ORADELL NJ
2016-12-05 585-401 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → TELNYX LLC 073H WYOMING NY
2016-12-05 587-210 not yet reported which blocks → Iristel Inc. 154E Lac La Biche —
2016-12-05 587-605 not yet reported which blocks → Iristel Inc. 154E Lloydminster —
2016-12-05 607-365 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H BINGHAMTON NY
2016-12-05 608-405 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H MADISON WI
2016-12-05 609-852 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H ATLNTIC CY NJ
2016-12-05 631-301 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H FARMINGDL NY
2016-12-05 701-498 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H BISMARCK ND
2016-12-05 716-482 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELNYX LLC 073H BUFFALO NY
2016-12-05 757-756 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H NRFOLKZON2 VA
2016-12-05 786-578 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2016-12-05 804-609 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H PETERSBURG VA
2016-12-05 845-404 0XXX1XXX8XXX9XXX · 2 holders which blocks → TELNYX LLC 073H POUGHKEPSI NY
2016-12-05 856-250 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H CAMDEN NJ
2016-12-05 902-709 not yet reported which blocks → Iristel Inc. 154E Shelburne —
2016-12-05 910-530 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H WILMINGTON NC
2016-12-05 912-250 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H SAVANNAH GA
2016-12-05 980-273 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H CHARLOTTE NC
2016-12-05 984-218 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H RALEIGH NC
2016-12-02 236-863 not yet reported which blocks → Fido Solutions Inc. 5643 Vancouver —
2016-12-02 236-865 not yet reported which blocks → Fido Solutions Inc. 5643 Vancouver —
2016-12-02 236-869 not yet reported which blocks → Fido Solutions Inc. 5643 Vancouver —
2016-12-02 339-240 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H BURLINGTON MA
2016-12-02 346-406 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H HOUSTON TX
2016-12-02 401-317 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H GREENWICH RI
2016-12-02 423-690 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H MORRISTOWN TN
2016-12-02 442-212 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H PALM SPG CA
2016-12-02 469-577 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H DALLAS TX
2016-12-02 629-216 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H NASHVILLE TN
2016-12-02 667-402 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H BALTIMORE MD
2016-12-02 737-402 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H AUSTIN TX
2016-12-02 757-782 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN1 VA
2016-12-02 778-745 not yet reported which blocks → Iristel Inc. 154E Fernie —
2016-12-02 802-200 0–9 XXXall 10 · 3 holders which blocks → NORTHFIELD TEL. CO. 0061 NORTHFIELD VT
2016-12-02 813-538 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H TAMPACEN FL
2016-12-02 830-402 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H NEWBRANFLS TX
2016-12-02 901-633 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H MEMPHIS TN
2016-12-02 901-708 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MEMPHIS TN
2016-12-01 541-675 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OR 750E MADRAS OR
2016-12-01 559-290 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FRESNO CA
2016-12-01 619-830 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-12-01 628-213 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-12-01 951-441 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON CA
2016-11-30 207-401 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BANGOR ME
2016-11-30 248-900 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C ORTONVILLE MI
2016-11-30 269-259 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NILES MI
2016-11-30 385-266 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-11-30 385-425 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E MURRAY UT
2016-11-30 425-382 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 EVERETT WA

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.