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
2019-01-28 551-340 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 HACKENSACK NJ
2019-01-28 551-370 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 RIDGEWOOD NJ
2019-01-28 605-600 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H RAPID CITY SD
2019-01-28 605-667 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HARISBGTEA SD
2019-01-28 620-444 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H GARDENCITY KS
2019-01-28 620-666 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H FLORENCE KS
2019-01-28 620-800 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H ANTHONY KS
2019-01-28 720-640 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 HUDSON CO
2019-01-28 720-750 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2019-01-28 810-529 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAPEER MI
2019-01-28 814-999 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H JOHNSTOWN PA
2019-01-28 828-666 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HICKORY NC
2019-01-28 870-705 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C ASH FLAT AR
2019-01-28 878-787 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PTTSBGZON1 PA
2019-01-28 910-666 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WILMINGTON NC
2019-01-25 213-588 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LSAN DA 14 CA
2019-01-25 213-877 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LSAN DA 09 CA
2019-01-25 220-800 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WLAFAYETTE OH
2019-01-25 229-297 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D PARROTT GA
2019-01-25 229-451 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D IRWINVILLE GA
2019-01-25 229-544 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D MORVEN GA
2019-01-25 229-592 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D PAVO GA
2019-01-25 229-682 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D WHIGHAM GA
2019-01-25 229-696 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D REYNOLDSVL GA
2019-01-25 234-516 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H MANCHESTR OH
2019-01-25 309-666 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PEORIA IL
2019-01-25 336-979 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINSTN SAL NC
2019-01-25 385-387 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-01-25 417-999 none assigned yet which blocks → TERRA NOVA TELECOM INC. 145J E ARCADIA MO
2019-01-25 430-333 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CORSICANA TX
2019-01-25 430-444 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H PARIS TX
2019-01-25 430-800 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PALESTINE TX
2019-01-25 431-434 not yet reported which blocks → Bell West Inc. 2933 Cross Lake —
2019-01-25 431-435 not yet reported which blocks → Bell West Inc. 2933 Gillam —
2019-01-25 431-436 not yet reported which blocks → Bell West Inc. 2933 Norway House —
2019-01-25 431-437 not yet reported which blocks → Bell West Inc. 2933 Oxford House —
2019-01-25 431-438 not yet reported which blocks → Bell West Inc. 2933 Split Lake —
2019-01-25 431-439 not yet reported which blocks → Bell West Inc. 2933 St. Theresa Point —
2019-01-25 567-816 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H LINDSEY OH
2019-01-25 567-899 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ASHLAND OH
2019-01-25 567-900 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H TOLEDO OH
2019-01-25 574-500 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GOSHEN IN
2019-01-25 574-666 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SOUTH BEND IN
2019-01-25 574-900 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WAKARUSA IN
2019-01-25 605-900 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SIOUX FLS SD
2019-01-25 626-655 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H COVINA CA
2019-01-25 626-778 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LA PUENTE CA
2019-01-25 626-866 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ALHAMBRA CA
2019-01-25 640-333 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BEACHHAVEN NJ
2019-01-25 640-666 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BARNEGAT NJ

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.