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
2013-07-26 469-608 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DALLAS TX
2013-07-26 562-247 0–9 XXXall 10 · 7 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LONG BEACH CA
2013-07-26 681-206 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 ARBOVALE WV
2013-07-26 681-224 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 DUNLOW WV
2013-07-26 681-312 0XXX3XXX4XXX9XXX · 2 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 CAMERON WV
2013-07-26 681-320 0XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 BURLINGTON WV
2013-07-26 681-375 0XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 BLACKSVL WV
2013-07-26 681-435 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → IDT AMERICA, CORP. - WV 317C DAVIS WV
2013-07-26 681-441 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F BRUCETONML WV
2013-07-26 681-448 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 CAPON BDG WV
2013-07-25 305-570 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KEYS FL
2013-07-25 312-678 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-07-25 567-318 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J TOLEDO OH
2013-07-25 614-779 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2013-07-25 720-403 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F DENVER CO
2013-07-25 980-201 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 CHARLOTTE NC
2013-07-24 252-231 0–9 XXXall 10 · 5 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G ROCKYMOUNT NC
2013-07-24 336-265 0–9 XXXall 10 · 4 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G GREENSBORO NC
2013-07-24 515-512 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - IA 6266 DES MOINES IA
2013-07-24 828-517 0XXX1XXX4XXX8XXX9XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G SYLVA NC
2013-07-24 910-218 0–9 XXXall 10 · 5 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G WILMINGTON NC
2013-07-24 910-302 0–9 XXXall 10 · 3 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G FAYETTEVL NC
2013-07-23 213-294 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2013-07-23 226-409 not yet reported which blocks → Gosfield North Communication Co-operative Ltd. 117H Belle River —
2013-07-23 226-727 not yet reported which blocks → Gosfield North Communication Co-operative Ltd. 117H Emeryville —
2013-07-23 289-539 not yet reported which blocks → Distributel 082E Ajax-Pickering —
2013-07-23 509-212 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 KENNEWICK WA
2013-07-23 647-517 not yet reported which blocks → Bell Mobility 6574 Toronto —
2013-07-23 720-456 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 4574 DENVER CO
2013-07-23 737-346 0–9 XXXall 10 · 5 holders which blocks → AUSTIN BESTLINE COMPANY 7551 AUSTIN TX
2013-07-23 786-618 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2013-07-22 650-445 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
2013-07-22 858-260 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LA JOLLA CA
2013-07-22 956-518 0–9 XXXall 10 · 4 holders which blocks → STPCS JOINT VENTURE, LLC 4290 BROWNSVL TX
2013-07-22 979-208 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARRENTON TX
2013-07-19 581-629 not yet reported which blocks → TELUS Quebec 2243 Levis —
2013-07-19 585-471 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2013-07-19 709-295 not yet reported which blocks → Bragg Communications Inc. 4878 St. Mary's —
2013-07-19 709-326 not yet reported which blocks → Bragg Communications Inc. 4878 Trepassey —
2013-07-19 709-493 not yet reported which blocks → Bragg Communications Inc. 4878 Witless Bay —
2013-07-19 709-756 not yet reported which blocks → Bragg Communications Inc. 4878 Cape Broyle —
2013-07-19 709-849 not yet reported which blocks → Bragg Communications Inc. 4878 Bell Island —
2013-07-19 857-305 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2013-07-19 873-387 not yet reported which blocks → TELUS Quebec 2243 Trois-Rivieres —
2013-07-19 873-388 not yet reported which blocks → TELUS Quebec 2243 Mont-Laurier —
2013-07-18 206-305 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2013-07-18 224-412 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NORTHBROOK IL
2013-07-18 321-307 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 COCOA FL
2013-07-18 587-540 not yet reported which blocks → Bell West Inc. 2933 Olds —
2013-07-18 904-510 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 JACKSONVL FL

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.