NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2011-05-30 226-438 not yet reported which blocks → Bragg Communications Inc. 4878 Paisley —
2011-05-30 226-439 not yet reported which blocks → Bragg Communications Inc. 4878 Milverton —
2011-05-30 226-441 not yet reported which blocks → Bragg Communications Inc. 4878 Bayfield —
2011-05-30 226-442 not yet reported which blocks → Bragg Communications Inc. 4878 Dashwood —
2011-05-30 226-447 not yet reported which blocks → Bragg Communications Inc. 4878 Clinton Independant —
2011-05-30 226-453 not yet reported which blocks → Bragg Communications Inc. 4878 Port Elgin —
2011-05-30 226-454 not yet reported which blocks → Bragg Communications Inc. 4878 Mildmay —
2011-05-27 251-265 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C MT VERNON AL
2011-05-27 334-310 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F PRATTVILLE AL
2011-05-27 513-306 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-356 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 585-888 0–9 XXXall 10 · 7 holders which blocks → FINGER LAKES TECHNOLOGIES GROUP, INC. - NY 629E SCOTTSVL NY
2011-05-27 646-538 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2011-05-27 708-247 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E LA GRANGE IL
2011-05-27 713-714 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HOUSTON TX
2011-05-27 812-777 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K EVANSVILLE IN
2011-05-27 817-388 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 GRAPEVINE TX
2011-05-27 913-241 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 KANSASCITY KS
2011-05-27 956-257 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RIGRANDECY TX
2011-05-26 385-205 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2011-05-26 408-478 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNJS SOUTH CA
2011-05-26 408-479 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNJS NORTH CA
2011-05-26 408-662 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNJS NORTH CA
2011-05-26 415-926 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-05-26 450-554 not yet reported which blocks → ISP Telecom Inc. 4727 Farnham —
2011-05-26 450-570 not yet reported which blocks → ISP Telecom Inc. 4727 Napierville —
2011-05-26 450-590 not yet reported which blocks → ISP Telecom Inc. 4727 Bedford —
2011-05-26 450-604 not yet reported which blocks → ISP Telecom Inc. 4727 Lacolle —
2011-05-26 469-266 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FRISCO TX
2011-05-26 505-375 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALBUQURQUE NM
2011-05-26 505-386 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F AZTEC NM
2011-05-26 515-639 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2011-05-26 559-852 0–9 XXXall 10 · 5 holders which blocks → PACIFIC BELL 9740 HANFORD CA
2011-05-26 605-646 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2011-05-26 605-781 not yet reported which blocks → NATIVE AMERICAN TELECOM - PINE RIDGE LLC - SD 870F KYLE SD
2011-05-26 619-346 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
2011-05-26 816-888 0–9 XXXall 10 · 6 holders which blocks → AVID COMMUNICATIONS, LLC - MO 718D KANSASCITY MO
2011-05-26 918-613 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-05-25 203-489 0–9 XXXall 10 · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2011-05-25 203-957 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K NORWALK CT
2011-05-25 224-230 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2011-05-25 432-344 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 COYANOSA TX
2011-05-25 432-537 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 IMPERIAL TX
2011-05-25 571-553 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 702-625 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2011-05-25 779-220 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CRYSTAL LK IL
2011-05-25 806-984 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → XIT RURAL TEL. COOP., INC. 2170 COLDWATER TX
2011-05-25 919-436 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 RALEIGH NC
2011-05-25 919-525 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CHAPELHILL NC
2011-05-24 336-935 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.