NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
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
2002-10-24 774-288 1XXX2XXX4XXX5XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 WESTBORO MA
2002-10-24 774-289 none assigned yet which blocks → METROPCS, INC. 5562 AUBURN MA
2002-10-24 845-667 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TUXEDO NY
2002-10-24 904-445 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 JACKSONVL FL
2002-10-24 914-482 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MAHOPAC NY
2002-10-24 941-993 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 SARASOTA FL
2002-10-24 989-944 6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MTPLEASANT MI
2002-10-23 229-669 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALBANY GA
2002-10-23 401-203 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 GREENWICH RI
2002-10-23 401-206 0XXX4XXX5XXX which blocks → METROPCS, INC. 5562 W WARWICK RI
2002-10-23 401-207 none assigned yet which blocks → METROPCS, INC. 5562 NARRAGNSTT RI
2002-10-23 401-252 0XXX2XXX4XXX5XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 WARREN RI
2002-10-23 401-269 0XXX2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → METROPCS, INC. 5562 COVENTRY RI
2002-10-23 401-297 0XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → METROPCS, INC. 5562 BRISTOL RI
2002-10-23 401-300 0XXX3XXX4XXX5XXX · 2 holders which blocks → METROPCS, INC. 5562 CENTREDALE RI
2002-10-23 401-309 0XXX4XXX5XXX · 2 holders which blocks → METROPCS, INC. 5562 WOONSOCKET RI
2002-10-23 419-601 6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BOWLNGGREN OH
2002-10-23 480-201 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2002-10-23 480-202 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2002-10-23 480-204 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2002-10-23 480-208 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2002-10-23 636-208 3XXX4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FSSCRSTLCY MO
2002-10-23 706-599 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TOCCOA GA
2002-10-23 717-799 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LANCASTER PA
2002-10-23 787-564 none assigned yet which blocks → METROPCS, INC. 5562 RIO GRANDE PR
2002-10-23 972-526 0–9 XXXall 10 · 2 holders which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
2002-10-22 203-273 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2002-10-22 217-807 7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GREENFIELD IL
2002-10-22 276-633 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ARARAT VA
2002-10-22 480-241 not yet reported which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2002-10-22 480-242 not yet reported which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2002-10-22 513-363 not yet reported which blocks → CINCINNATI BELL 9348 CINCINNATI OH
2002-10-22 567-674 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 KENTON OH
2002-10-22 651-472 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 STILLWATER MN
2002-10-22 678-639 9XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA NE GA
2002-10-22 772-577 2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FORTPIERCE FL
2002-10-22 813-393 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2002-10-22 814-482 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HOWARD PA
2002-10-22 815-718 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - IL 6265 STERLING IL
2002-10-22 815-990 4XXX5XXX6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 FREEPORT IL
2002-10-22 847-315 0–9 XXXall 10 · 3 holders which blocks → ILLINOIS BELL TEL CO 9329 DEERFIELD IL
2002-10-22 860-287 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW LONDON CT
2002-10-22 860-324 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
2002-10-22 914-433 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 WSCHSTZN01 NY
2002-10-22 914-434 5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 MOUNTKISCO NY
2002-10-21 304-906 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 MORGANTOWN WV
2002-10-21 304-907 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 WHELNGZON1 WV
2002-10-21 325-374 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SAN ANGELO TX
2002-10-21 325-829 none assigned yet which blocks → METROPCS, INC. 5562 ABILENE TX
2002-10-21 325-866 0XXX1XXX2XXX3XXX6XXX7XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 SNYDER TX

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.