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
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
2017-03-22 385-394 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2017-03-22 406-510 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MT 453F MISSOULA MT
2017-03-22 413-278 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SPRINGFLD MA
2017-03-22 470-458 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H FLOWEYBRCH GA
2017-03-22 502-830 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - KY 896E LOUISVILLE KY
2017-03-22 504-291 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H NEWORLEANS LA
2017-03-22 507-516 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D ROCHESTER MN
2017-03-22 573-508 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TAOS MO
2017-03-22 731-229 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H PARIS TN
2017-03-22 731-244 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → TELNYX LLC 073H SELMER TN
2017-03-22 762-999 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - GA 067D WATKINSVL GA
2017-03-22 901-250 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H LAGRANGE TN
2017-03-22 931-272 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H CLARKSVL TN
2017-03-22 931-324 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H LAWRENCEBG TN
2017-03-22 978-949 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MANCHESTER MA
2017-03-21 336-604 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NC 638E GREENSBORO NC
2017-03-21 431-241 not yet reported which blocks → Bell Mobility 6574 Norway House —
2017-03-21 431-242 not yet reported which blocks → Bell Mobility 6574 Eddystone —
2017-03-21 431-779 not yet reported which blocks → Bell Mobility 6574 Snow Lake —
2017-03-21 431-782 not yet reported which blocks → Bell Mobility 6574 Split Lake —
2017-03-21 434-478 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E CLOVER VA
2017-03-21 786-753 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H MIAMI FL
2017-03-21 904-878 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H JACKSONVL FL
2017-03-21 980-284 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H LINCOLNTON NC
2017-03-21 980-308 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E CHARLOTTE NC
2017-03-21 980-483 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H DAVIDSON NC
2017-03-21 980-759 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H STATESVL NC
2017-03-21 980-892 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H SALISBURY NC

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.