NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
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
2013-09-12 510-320 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2013-09-12 615-905 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7977 FRANKLIN TN
2013-09-12 651-419 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D NORTH BRCH MN
2013-09-12 774-803 0–9 XXXall 10 · 5 holders which blocks → VERIZON NEW ENGLAND INC. 9102 HOPKINTON MA
2013-09-11 336-914 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DANBURY NC
2013-09-11 706-709 0XXX1XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - GA 067D METASVILLE GA
2013-09-10 317-995 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2013-09-10 404-947 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2013-09-10 438-301 not yet reported which blocks → Bell Mobility 6574 Montreal —
2013-09-10 470-210 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2013-09-10 470-228 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 GAINESVL GA
2013-09-10 587-525 not yet reported which blocks → Shaw Telecom Inc. 497E Edmonton —
2013-09-10 647-392 not yet reported which blocks → Bell Mobility 6574 Toronto —
2013-09-10 647-516 not yet reported which blocks → Bell Mobility 6574 Toronto —
2013-09-10 681-675 2XXX5XXX7XXX8XXX · 3 holders which blocks → CSC VOICE, LLC 612K LETART WV
2013-09-09 248-378 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NORTHVILLE MI
2013-09-09 262-232 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
2013-09-09 302-803 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2013-09-09 317-649 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
2013-09-09 513-808 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2013-09-09 719-354 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2013-09-09 720-372 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2013-09-09 803-618 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 JOHNSTON SC
2013-09-09 816-328 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY MO
2013-09-09 915-218 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 EL PASO TX
2013-09-09 939-221 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 LUQUILLO PR
2013-09-06 587-354 not yet reported which blocks → Shaw Telecom Inc. 497E Calgary —
2013-09-06 604-423 not yet reported which blocks → Shaw Telecom Inc. 497E Vancouver —
2013-09-06 651-352 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2013-09-06 867-383 not yet reported which blocks → Bell Mobility 6574 Mayo —
2013-09-06 867-384 not yet reported which blocks → Bell Mobility 6574 Teslin —
2013-09-06 867-385 not yet reported which blocks → Bell Mobility 6574 Carmacks —
2013-09-06 929-239 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN03 NY
2013-09-05 234-702 0XXX1XXX2XXX3XXX4XXX5XXX which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F AURORA OH
2013-09-05 567-801 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
2013-09-05 702-910 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2013-09-05 708-737 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2013-09-05 716-288 0–9 XXXall 10 · 6 holders which blocks → XO NEW YORK, INC. 8340 LANCASTER NY
2013-09-05 949-247 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 IRVINE CA
2013-09-04 289-487 not yet reported which blocks → ISP Telecom Inc. 4727 Bolton —
2013-09-04 717-353 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 NEW OXFORD PA
2013-09-04 778-315 not yet reported which blocks → Navigata Communications Limited 078G Douglas Lake —
2013-09-04 778-376 not yet reported which blocks → Navigata Communications Limited 078G North Kamloops —
2013-09-04 778-393 not yet reported which blocks → Navigata Communications Limited 078G Savona —
2013-09-04 778-573 not yet reported which blocks → Navigata Communications Limited 078G Dallas —
2013-09-04 778-577 not yet reported which blocks → Navigata Communications Limited 078G Pritchard —
2013-09-04 778-579 not yet reported which blocks → Navigata Communications Limited 078G Westsyde —
2013-09-04 778-673 not yet reported which blocks → Navigata Communications Limited 078G Blue River —
2013-09-04 832-791 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SPRING TX
2013-09-04 929-246 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN03 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.