NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
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
2012-07-23 570-810 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TAMAQUA PA
2012-07-23 712-377 0XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 GRAVITY IA
2012-07-23 717-316 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 HANOVER PA
2012-07-23 757-707 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WILLIAMSBG VA
2012-07-23 873-624 not yet reported which blocks → Videotron Ltd. 8306 Frontenac —
2012-07-23 909-345 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E DIAMONDBAR CA
2012-07-20 702-329 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2012-07-20 909-369 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 REDLANDS CA
2012-07-20 956-215 0–9 XXXall 10 · 3 holders which blocks → TRANSTELCO, INC. - TX 679E MCALLEN TX
2012-07-19 207-747 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PORTLAND ME
2012-07-19 513-901 0–9 XXXall 10 · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 WILLIAMSBG OH
2012-07-19 603-375 0XXX3XXX4XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ASHLAND NH
2012-07-19 812-351 0–9 XXXall 10 · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C JASPER IN
2012-07-19 873-585 not yet reported which blocks → Telebec Ltee. 8239 Frontenac —
2012-07-18 616-288 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2012-07-17 226-726 not yet reported which blocks → Fibernetics Corporation 464D Strathroy —
2012-07-17 289-965 not yet reported which blocks → Fibernetics Corporation 464D Stoney Creek —
2012-07-17 315-951 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E CANASTOTA NY
2012-07-17 518-660 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 HUDSON NY
2012-07-17 647-943 not yet reported which blocks → Zayo Canada Inc. 8304 Toronto —
2012-07-17 707-392 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VACAVILLE CA
2012-07-17 716-670 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 DERBY NY
2012-07-17 845-660 0–9 XXXall 10 · 7 holders which blocks → AT&T - LOCAL 7421 AMENIA NY
2012-07-17 873-622 not yet reported which blocks → Videotron Ltd. 8306 Woburn —
2012-07-17 873-623 not yet reported which blocks → Videotron Ltd. 8306 Waterville —
2012-07-16 251-262 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F JACKSON AL
2012-07-16 469-316 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2012-07-16 651-318 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 HASTINGS MN
2012-07-16 832-718 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2012-07-16 859-412 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 COVINGTON KY
2012-07-16 917-485 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN11 NY
2012-07-13 224-302 0–9 XXXall 10 · 7 holders which blocks → ILLINOIS BELL TEL CO 9329 WAUKEGAN IL
2012-07-13 234-240 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH
2012-07-13 323-477 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2012-07-13 440-405 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BRECKSVL OH
2012-07-13 470-204 0–9 XXXall 10 · 8 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GRIFFIN GA
2012-07-13 559-369 0–9 XXXall 10 · 6 holders which blocks → WIDE VOICE, LLC - CA 252F FRESNO CA
2012-07-13 586-343 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ROSEVILLE MI
2012-07-13 608-518 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
2012-07-13 810-228 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2012-07-13 810-259 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2012-07-13 810-285 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2012-07-13 918-986 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J TULSA OK
2012-07-12 313-229 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2012-07-12 313-352 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2012-07-12 812-832 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SCOTTSBURG IN
2012-07-11 319-359 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY LLC 593K IOWA CITY IA
2012-07-10 319-678 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 431-251 not yet reported which blocks → Bell West Inc. 2933 Portage La Prairie —
2012-07-10 579-477 not yet reported which blocks → ISP Telecom Inc. 4727 Ste-Therese —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.