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
2017-03-27 806-599 0–9 XXXall 10 · 4 holders which blocks → MID-PLAINS RURAL TEL COOP DBA MID-PLAINS COMM-TX 982H AMARILLO TX
2017-03-27 812-957 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 HOPE IN
2017-03-27 901-437 0–9 XXXall 10 · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2017-03-27 901-805 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2017-03-27 972-990 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-24 209-990 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H STOCKTON CA
2017-03-24 213-878 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H LSAN DA 01 CA
2017-03-24 234-375 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H MANCHESTR OH
2017-03-24 307-249 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H JACKSON WY
2017-03-24 320-378 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MN 184D HERMAN MN
2017-03-24 320-560 0XXX1XXX3XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MN 184D PRINSBURG MN
2017-03-24 406-916 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HELENA MT
2017-03-24 442-217 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VALLEY CTR CA
2017-03-24 530-630 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H CHICO CA
2017-03-24 531-218 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LINCOLN NE
2017-03-24 531-375 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 OMAHA NE
2017-03-24 548-480 not yet reported which blocks → Iristel Inc. 154E Kitchener-Waterloo —
2017-03-24 548-481 not yet reported which blocks → Iristel Inc. 154E Kitchener-Waterloo —
2017-03-24 548-482 not yet reported which blocks → Iristel Inc. 154E London —
2017-03-24 559-878 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H FRESNO CA
2017-03-24 561-344 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DELRAY BCH FL
2017-03-24 561-675 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2017-03-24 587-740 not yet reported which blocks → Iristel Inc. 154E Hardisty —
2017-03-24 587-741 not yet reported which blocks → Iristel Inc. 154E Hay Lakes —
2017-03-24 587-742 not yet reported which blocks → Iristel Inc. 154E Wetaskiwin —
2017-03-24 628-867 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H SNFC CNTRL CA
2017-03-24 636-865 0XXX5XXX6XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 HILLSBORO MO
2017-03-24 661-662 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H BKFD MAIN CA
2017-03-24 667-220 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D GREENSBORO MD
2017-03-24 667-285 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D HURLOCK MD
2017-03-24 669-216 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2017-03-24 719-619 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H COLORDOSPG CO
2017-03-24 805-505 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H SNLUSOBSPO CA
2017-03-24 831-867 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMMIO, LLC 939H MONTEREY CA
2017-03-24 850-480 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C PENSACOLA FL
2017-03-24 910-882 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 FAYETTEVL NC
2017-03-24 916-926 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H SCRM MAIN CA
2017-03-24 980-465 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLOTTE NC
2017-03-23 518-918 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H ALBANY NY
2017-03-23 559-701 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CLOVIS CA
2017-03-23 605-404 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 SIOUX FLS SD
2017-03-23 607-707 0XXX8XXX9XXX which blocks → COMMIO, LLC 939H BINGHAMTON NY
2017-03-23 619-530 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNDG SNDG CA
2017-03-23 636-303 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H UNION MO
2017-03-23 646-949 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H NWYRCYZN01 NY
2017-03-23 647-934 not yet reported which blocks → Bell Mobility 6574 Toronto —
2017-03-23 716-420 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H BUFFALO NY
2017-03-23 845-880 0XXX6XXX7XXX8XXX · 2 holders which blocks → COMMIO, LLC 939H POUGHKEPSI NY
2017-03-23 925-503 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 ANTIOCH CA
2017-03-23 951-758 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C RIVERSIDE CA

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.