NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2002-06-21 567-223 1XXX2XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LOUDONVL OH
2002-06-21 567-351 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEW LONDON OH
2002-06-21 567-510 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CELINA OH
2002-06-21 567-523 3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NORTH STAR OH
2002-06-21 567-621 1XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FTRECOVERY OH
2002-06-21 586-524 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2002-06-21 812-267 5XXX6XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CORYDON IN
2002-06-21 812-686 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DALE IN
2002-06-21 812-719 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TELL CITY IN
2002-06-21 812-766 6XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PETERSBURG IN
2002-06-21 812-781 3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWHARMONY IN
2002-06-21 812-786 3XXX4XXX5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 NEW ALBANY IN
2002-06-21 815-566 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELVIDERE IL
2002-06-20 253-255 3XXX4XXX which blocks → T-MOBILE USA, INC. 6529 TACOMA WA
2002-06-20 256-278 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ATHENS AL
2002-06-20 256-280 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 DECATUR AL
2002-06-20 256-418 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FORT PAYNE AL
2002-06-20 256-455 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALBERTVL AL
2002-06-20 256-841 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 CULLMAN AL
2002-06-20 334-246 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 AUBURN AL
2002-06-20 360-774 2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PTTOWNSEND WA
2002-06-20 360-775 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PT ANGELES WA
2002-06-20 414-248 4XXX5XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILWAUKZN1 WI
2002-06-20 501-499 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CONWAY AR
2002-06-20 502-465 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CAMPBELSBG KY
2002-06-20 502-466 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GHENT KY
2002-06-20 502-467 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MILTON KY
2002-06-20 502-662 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CARROLLTON KY
2002-06-20 502-663 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BEDFORD KY
2002-06-20 540-425 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BEDFORD VA
2002-06-20 608-628 5XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MADISON WI
2002-06-20 646-372 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2002-06-20 862-755 none assigned yet which blocks → METROPCS, INC. 5562 NEWARK NJ
2002-06-20 910-536 1XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 LUMBERTON NC
2002-06-20 910-538 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 WILMINGTON NC
2002-06-20 910-539 0XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 JACKSONVL NC
2002-06-20 914-424 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 WSCHSTZN08 NY
2002-06-20 919-396 5XXX6XXX9XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GOLDSBORO NC
2002-06-20 973-280 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 ORANGE NJ
2002-06-19 208-806 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ID 7558 KETCHUM ID
2002-06-19 219-916 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 VALPARAISO IN
2002-06-19 224-715 not yet reported which blocks → T-MOBILE USA, INC. 6529 LIBERTYVL IL
2002-06-19 252-557 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ROCKYMOUNT NC
2002-06-19 252-558 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENVILLE NC
2002-06-19 252-661 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WILLIAMSTN NC
2002-06-19 270-632 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 HOPKINSVL KY
2002-06-19 270-872 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 ELIZABTHTN KY
2002-06-19 325-206 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SONORA TX
2002-06-19 325-207 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SNYDER TX
2002-06-19 406-545 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MT 9415 BILLINGS MT

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.