NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-12-30 539-209 0–9 XXXall 10 · 5 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 WAGONER OK
2016-12-30 805-873 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D SANTAPAULA CA
2016-12-30 909-755 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K UPLAND CA
2016-12-30 951-466 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2016-12-29 561-359 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J DELRAY BCH FL
2016-12-29 571-368 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 DALE CITY VA
2016-12-29 612-297 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2016-12-29 667-204 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ANNAPOLIS MD
2016-12-29 774-394 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 E DOUGLAS MA
2016-12-29 786-495 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2016-12-29 873-653 not yet reported which blocks → Videotron Ltd. 8306 Drummondville —
2016-12-29 915-263 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EL PASO TX
2016-12-28 210-583 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2016-12-28 484-659 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 READING PA
2016-12-28 539-313 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 TULSA OK
2016-12-28 873-673 not yet reported which blocks → Fibernetics Corporation 464D Gatineau —
2016-12-28 978-690 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LAWRENCE MA
2016-12-27 424-423 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL SEGUNDO CA
2016-12-27 561-268 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2016-12-27 747-291 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2016-12-27 978-892 0–9 XXXwhole prefix which blocks → VERIZON NEW ENGLAND INC. 9102 LAWRENCE MA
2016-12-23 248-970 0–9 XXXall 10 · 6 holders which blocks → CLEAR RATE COMMUNICATIONS, LLC 046L W BLOOMFLD MI
2016-12-23 314-818 0–9 XXXall 10 · 8 holders which blocks → TELNYX LLC 073H ST LOUIS MO
2016-12-23 365-265 not yet reported which blocks → IXICA Communications Inc. 812H Victoria —
2016-12-23 365-325 not yet reported which blocks → IXICA Communications Inc. 812H Castlemore —
2016-12-23 365-333 not yet reported which blocks → IXICA Communications Inc. 812H Brampton —
2016-12-23 365-335 not yet reported which blocks → IXICA Communications Inc. 812H Caledon East —
2016-12-23 365-465 not yet reported which blocks → IXICA Communications Inc. 812H Cooksville —
2016-12-23 365-565 not yet reported which blocks → IXICA Communications Inc. 812H Streetsville —
2016-12-23 365-665 not yet reported which blocks → IXICA Communications Inc. 812H Malton —
2016-12-23 365-765 not yet reported which blocks → IXICA Communications Inc. 812H Clarkson —
2016-12-23 365-865 not yet reported which blocks → IXICA Communications Inc. 812H Port Credit —
2016-12-23 365-965 not yet reported which blocks → IXICA Communications Inc. 812H Snelgrove —
2016-12-23 470-882 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NW GA
2016-12-23 506-406 not yet reported which blocks → Iristel Inc. 154E Fredericton —
2016-12-23 506-606 not yet reported which blocks → Iristel Inc. 154E Fredericton —
2016-12-23 581-405 not yet reported which blocks → IVIC Telecom s.e.n.c 817D La Guadeloupe —
2016-12-23 605-453 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 MILLER SD
2016-12-23 626-777 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ARCADIA CA
2016-12-22 210-676 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2016-12-22 507-500 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 CALEDONIA MN
2016-12-22 585-448 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2016-12-22 614-964 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 WESTERVL OH
2016-12-22 786-918 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2016-12-22 812-921 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GEORGETOWN IN
2016-12-22 812-980 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GALENA IN
2016-12-22 870-999 0XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 CROSSETT AR
2016-12-21 206-712 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SEATTLE WA
2016-12-21 228-256 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H GULFPORT MS
2016-12-21 307-475 1XXX3XXX6XXX7XXX8XXX · 2 holders which blocks → TELNYX LLC 073H CHEYENNE WY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.