NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2002-04-24 435-572 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 CEDAR CITY UT
2002-04-24 435-612 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MONROE UT
2002-04-24 435-633 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 RICHFIELD UT
2002-04-24 662-588 not yet reported which blocks → CELLULAR SOUTH, INC. 6581 CLEVELAND MS
2002-04-24 724-931 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 SHARON PA
2002-04-23 203-906 0XXX3XXX4XXX5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2002-04-23 270-254 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLINTON KY
2002-04-23 513-341 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 HAMILTON OH
2002-04-23 561-568 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2002-04-23 561-666 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 DELRAY BCH FL
2002-04-23 561-667 not yet reported which blocks → METROPCS, INC. 5562 WPALMBEACH FL
2002-04-23 720-972 not yet reported which blocks → QWEST CORPORATION 9636 DENVER CO
2002-04-23 740-212 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F GLENFORD OH
2002-04-23 740-214 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OH 464C ROSEVILLE OH
2002-04-23 740-217 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OH 464C WALNUT OH
2002-04-23 740-218 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F WOODSFIELD OH
2002-04-23 740-224 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C GRAYSVILLE OH
2002-04-23 740-240 0–9 XXXall 10 · 9 holders which blocks → ONVOY, LLC - OH 464C RUSHVILLE OH
2002-04-23 740-267 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - OH 464C LEWISVILLE OH
2002-04-23 740-299 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C CLARINGTON OH
2002-04-23 740-301 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 7 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F RIO GRANDE OH
2002-04-23 740-303 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C PHILO OH
2002-04-23 740-306 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OH 464C GUYAN OH
2002-04-23 740-307 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FIRST COMMUNICATIONS, LLC 460K IRONTON OH
2002-04-23 740-309 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → ONVOY, LLC - OH 464C BARNESVL OH
2002-04-23 740-313 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FIRST COMMUNICATIONS, LLC 460K WSNGTNCTHS OH
2002-04-23 740-315 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BELPRE OH
2002-04-23 740-318 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OH 464C SUGARGROVE OH
2002-04-23 740-337 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C TORONTO OH
2002-04-23 740-402 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C CONESVILLE OH
2002-04-23 740-419 0–9 XXXall 10 · 9 holders which blocks → ONVOY, LLC - OH 464C MILLEDGEVL OH
2002-04-23 740-434 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FIRST COMMUNICATIONS, LLC 460K MARIETTA OH
2002-04-23 740-470 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C SEDALIA OH
2002-04-23 740-471 1XXX5XXX7XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BLOOMINGBG OH
2002-04-23 740-488 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C JEFFERSNVL OH
2002-04-23 740-518 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C DRESDEN OH
2002-04-23 740-530 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C DUFFY OH
2002-04-23 740-539 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → FIRST COMMUNICATIONS, LLC 460K LANCASTER OH
2002-04-23 740-563 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C MINGO JCT OH
2002-04-23 740-580 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OH 464C SHAWNEE OH
2002-04-23 740-610 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FIRST COMMUNICATIONS, LLC 460K COSHOCTON OH
2002-04-23 740-660 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C ARABIA OH
2002-04-23 740-661 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C FULTONHAM OH
2002-04-23 740-693 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OH 464C WLAFAYETTE OH
2002-04-23 740-720 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C NEWHOLLAND OH
2002-04-23 740-721 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C NEWLXINGTN OH
2002-04-23 740-761 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C BETHESDA OH
2002-04-23 740-786 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C SOMERTON OH
2002-04-23 740-794 0XXX1XXX3XXX6XXX8XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K GALLIPOLIS OH
2002-04-23 740-806 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C CHESHIRE OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.