NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2011-11-10 775-203 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 RENO NV
2011-11-10 786-410 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E HOMESTEAD FL
2011-11-10 857-202 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-11-10 862-217 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 MORRISTOWN NJ
2011-11-09 206-641 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2011-11-09 218-210 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E BEMIDJI MN
2011-11-09 319-343 0–9 XXXall 10 · 3 holders which blocks → SHELLSBURG CABLEVISION, INC. - IA 527G CENTER PT IA
2011-11-09 443-634 0–9 XXXwhole prefix which blocks → VERIZON MARYLAND, INC. 9212 WATERLO236 MD
2011-11-09 615-806 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2011-11-09 646-568 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2011-11-09 917-618 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2011-11-09 920-709 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J JUNEAU WI
2011-11-08 202-740 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2011-11-08 225-224 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-11-08 331-208 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 AURORA IL
2011-11-08 404-621 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2011-11-08 404-709 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2011-11-08 407-631 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ORLANDO FL
2011-11-08 484-628 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 READING PA
2011-11-08 708-509 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-11-08 708-559 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-11-08 813-304 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2011-11-08 971-256 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF OREGON, LLC - OR 157F PORTLAND OR
2011-11-07 240-270 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2011-11-07 410-618 0–9 XXXall 10 · 5 holders which blocks → IDT AMERICA, CORP. - MD 228C PERRYVILLE MD
2011-11-07 412-627 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-11-07 469-267 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ROCKWALL TX
2011-11-07 484-268 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2011-11-07 614-541 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 HILLIARD OH
2011-11-07 702-704 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NV 587C LAS VEGAS NV
2011-11-07 786-452 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C MIAMI FL
2011-11-07 814-475 0–9 XXXall 10 · 4 holders which blocks → VERIZON NORTH, INC. - PA 0169 JOHNSTOWN PA
2011-11-07 980-265 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F CHARLOTTE NC
2011-11-04 438-476 not yet reported which blocks → ISP Telecom Inc. 4727 Montreal —
2011-11-04 438-477 not yet reported which blocks → ISP Telecom Inc. 4727 Montreal —
2011-11-04 438-478 not yet reported which blocks → ISP Telecom Inc. 4727 Montreal —
2011-11-04 438-479 not yet reported which blocks → ISP Telecom Inc. 448K Montreal —
2011-11-04 510-294 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 HAYWARD CA
2011-11-04 816-287 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2011-11-03 224-205 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NORTHBROOK IL
2011-11-03 309-203 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EASTMOLINE IL
2011-11-03 318-437 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C FERRIDAY LA
2011-11-03 318-625 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C ALEXANDRIA LA
2011-11-03 321-444 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G WINTERPARK FL
2011-11-03 786-409 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-11-03 971-203 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ST HELENS OR
2011-11-02 204-806 not yet reported which blocks → MTS Inc. 991B Winnipeg —
2011-11-02 240-713 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MARYLAND, LLC 568G LAUREL236 MD
2011-11-02 404-747 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2011-11-02 405-669 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.