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
2004-06-30 724-406 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 383J SLIPPERYRK PA
2004-06-30 780-241 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Drayton Valley —
2004-06-30 780-290 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 St. Paul —
2004-06-30 864-613 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 WESTMINSTR SC
2004-06-30 864-719 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 SALEM SC
2004-06-30 910-441 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 KENANSVL NC
2004-06-29 229-202 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CEDAR SPG GA
2004-06-29 516-342 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN08 NY
2004-06-29 803-820 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 HICKORYGRV SC
2004-06-29 920-240 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WAUTOMA WI
2004-06-29 920-260 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MARKESAN WI
2004-06-28 309-946 not yet reported which blocks → GENESEO TEL. CO. 1016 GENESEO IL
2004-06-28 740-469 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CROOKSVL OH
2004-06-28 815-517 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 DE KALB IL
2004-06-28 912-207 1XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCREVEN GA
2004-06-28 954-206 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 FTLAUDERDL FL
2004-06-25 386-202 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 PIERSON FL
2004-06-25 417-349 4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 MOUNTANGRV MO
2004-06-25 417-372 4XXX5XXX6XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 WESTPLAINS MO
2004-06-25 580-579 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 DURANT OK
2004-06-24 210-237 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-06-24 585-472 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2004-06-24 704-719 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7858 CHARLOTTE NC
2004-06-24 765-353 3XXX4XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 UNION CITY IN
2004-06-24 787-674 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2004-06-24 904-207 0–9 XXXall 10 · 3 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2004-06-23 309-518 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LEWISTOWN IL
2004-06-23 402-414 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - NE 6263 AUBURN NE
2004-06-23 402-418 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - NE 6263 CRETE NE
2004-06-23 513-291 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SEVEN MILE OH
2004-06-23 517-219 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FOWLERVL MI
2004-06-23 573-416 0–9 XXXall 10 · 8 holders which blocks → UNITED STATES CELLULAR - MO 6275 FULTON MO
2004-06-23 573-418 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 JEFFERSNCY MO
2004-06-23 715-260 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KENNAN WI
2004-06-23 715-280 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHAWANO WI
2004-06-23 715-301 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WAUSAU WI
2004-06-23 813-200 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TAMPA FL
2004-06-23 845-701 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MONTICELLO NY
2004-06-23 985-236 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 PIERREPART LA
2004-06-22 302-288 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WILMINGTON DE
2004-06-22 404-200 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2004-06-22 416-786 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2004-06-22 416-904 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2004-06-22 613-577 not yet reported which blocks → TELUS Mobility 8303 Cornwall —
2004-06-22 616-504 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CLARKSVL MI
2004-06-22 780-725 not yet reported which blocks → TELUS 8084 Edson —
2004-06-21 416-902 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2004-06-21 416-903 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2004-06-21 646-329 0–9 XXXall 10 · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NWYRCYZN01 NY
2004-06-21 778-998 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Vancouver —

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.