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
2012-05-22 484-523 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ALLENTOWN PA
2012-05-22 518-410 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2012-05-22 520-612 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2012-05-22 602-888 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2012-05-22 636-638 0–9 XXXall 10 · 7 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K FSSCRSTLCY MO
2012-05-22 651-333 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MINNESOTA, LLC - MN 107F TWINCITIES MN
2012-05-22 832-701 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2012-05-22 901-352 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 LAGRANGE TN
2012-05-22 980-314 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 CHARLOTTE NC
2012-05-22 980-777 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F CONCORD NC
2012-05-21 321-336 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G COCOABEACH FL
2012-05-21 415-535 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2012-05-21 518-440 0XXX2XXX4XXX7XXX · 4 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 830G CHATHAM NY
2012-05-21 612-314 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2012-05-21 727-333 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G CLEARWATER FL
2012-05-21 727-888 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J TARPON SPG FL
2012-05-21 754-800 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G POMPANOBCH FL
2012-05-18 204-557 not yet reported which blocks → TELUS Mobility 8303 Winnipeg —
2012-05-18 204-558 not yet reported which blocks → TELUS Mobility 8303 Winnipeg —
2012-05-18 208-889 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - ID 808G COERDALENE ID
2012-05-18 218-460 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E MOOSE LAKE MN
2012-05-18 226-243 not yet reported which blocks → Iristel Inc. 154E Kitchener-Waterloo —
2012-05-18 289-608 not yet reported which blocks → Fibernetics Corporation 464D Ajax-Pickering —
2012-05-18 518-419 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2012-05-18 579-914 not yet reported which blocks → Iristel Inc. 154E Terrebonne —
2012-05-18 587-288 not yet reported which blocks → Fibernetics Corporation 464D Calgary —
2012-05-18 587-450 not yet reported which blocks → Shaw Telecom Inc. 497E Fort McMurray —
2012-05-18 928-323 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 SOMERTON AZ
2012-05-17 208-917 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - ID 808G BOISE ID
2012-05-17 408-614 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CAMPBELL CA
2012-05-17 480-489 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2012-05-17 520-332 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 TUCSON AZ
2012-05-17 540-676 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROANOKE VA
2012-05-17 616-275 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CALEDONIA MI
2012-05-17 786-257 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2012-05-17 786-391 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2012-05-17 919-579 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SANFORD NC
2012-05-16 240-488 0–9 XXXall 10 · 8 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - MD 836G OAKLAND MD
2012-05-16 609-673 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J PRINCETON NJ
2012-05-15 219-240 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 GARY IN
2012-05-15 226-636 not yet reported which blocks → Distributel 082E London —
2012-05-15 226-666 not yet reported which blocks → Fibernetics Corporation 464D Kitchener-Waterloo —
2012-05-15 289-919 not yet reported which blocks → Distributel 082E Hamilton —
2012-05-15 289-931 not yet reported which blocks → TELUS Mobility 8303 St. Catharines-Thorold —
2012-05-15 289-996 not yet reported which blocks → TELUS Mobility 8303 Oshawa —
2012-05-15 385-209 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2012-05-15 405-569 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-05-15 504-425 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
2012-05-15 602-422 0–9 XXXall 10 · 4 holders which blocks → RE-INVENT TELECOM, LLC - AZ 663G PHOENIX AZ
2012-05-15 613-319 not yet reported which blocks → Distributel 082E Ottawa-Hull —

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.