NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
2002-08-27 231-806 not yet reported which blocks → 123.NET, LLC 2550 CORAL MI
2002-08-27 231-836 not yet reported which blocks → 123.NET, LLC 2550 EVART MI
2002-08-27 231-842 not yet reported which blocks → 123.NET, LLC 2550 CADILLAC MI
2002-08-27 231-874 not yet reported which blocks → 123.NET, LLC 2550 WOLVERINE MI
2002-08-27 231-899 not yet reported which blocks → 123.NET, LLC 2550 NORTHPORT MI
2002-08-27 231-908 not yet reported which blocks → 123.NET, LLC 2550 MCBAIN MI
2002-08-27 231-925 5XXX7XXX · 2 holders which blocks → 123.NET, LLC 2550 SCOTTVILLE MI
2002-08-27 231-974 1XXX2XXX3XXX4XXX6XXX · 4 holders which blocks → 123.NET, LLC 2550 GRANT MI
2002-08-27 251-202 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BAYMINETTE AL
2002-08-27 253-235 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMAWVLY WA
2002-08-27 253-236 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENT WA
2002-08-27 256-450 not yet reported which blocks → CENTURYLINK COMMUNICATIONS LLC - AL 7451 HUNTSVILLE AL
2002-08-27 330-601 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SUPER-NET, INC. - OH 155F WOOSTER OH
2002-08-27 479-252 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENWOOD AR
2002-08-27 484-854 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 COLLEGEVL PA
2002-08-27 513-318 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MIDDLETOWN OH
2002-08-27 567-241 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2002-08-27 567-242 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LIMA OH
2002-08-27 570-737 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 SPRINGVL PA
2002-08-27 574-575 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2002-08-27 580-791 3XXX4XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATONGA OK
2002-08-27 607-351 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ITHACA NY
2002-08-27 608-481 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BELOIT WI
2002-08-27 631-327 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON NY
2002-08-27 775-291 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CARSONCITY NV
2002-08-27 804-349 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RICHMOND VA
2002-08-27 812-759 not yet reported which blocks → PAETEC ITEL, LLC 829J EVANSVILLE IN
2002-08-27 812-761 not yet reported which blocks → PAETEC ITEL, LLC 829J PRINCETON IN
2002-08-27 812-771 not yet reported which blocks → PAETEC ITEL, LLC 829J JASPER IN
2002-08-27 863-283 not yet reported which blocks → NOVUS COMMUNICATIONS, INC. - FL 9324 ARCADIA FL
2002-08-27 870-277 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2002-08-27 870-377 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUMAS AR
2002-08-27 870-378 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POCAHONTAS AR
2002-08-27 912-277 0XXX1XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 VIDALIA GA
2002-08-27 920-284 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 APPLETON WI
2002-08-27 956-230 6XXX7XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HARLINGEN TX
2002-08-27 989-351 1XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROGERSCITY MI
2002-08-26 253-928 not yet reported which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
2002-08-26 352-834 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DADE CITY FL
2002-08-26 352-835 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WEEKICHSPG FL
2002-08-26 409-548 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PORTARTHUR TX
2002-08-26 512-561 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MILANO TX
2002-08-26 512-562 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LOMETA TX
2002-08-26 570-656 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 STROUDSBG PA
2002-08-26 570-657 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 JIM THORPE PA
2002-08-26 608-449 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 JANESVILLE WI
2002-08-26 636-486 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 HARVESTER MO
2002-08-26 636-487 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST CHARLES MO
2002-08-26 715-881 8XXX which blocks → NEW CELL DBA CELLCOM 6692 WITTENBERG WI
2002-08-26 803-295 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 AIKEN SC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.