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
2013-05-09 708-831 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2013-05-09 832-664 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 HSTNSUBURB TX
2013-05-08 404-458 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF GEORGIA, LLC - GA 909E ATLANTA GA
2013-05-08 480-878 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2013-05-08 484-934 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BETHLEHEM PA
2013-05-08 506-989 not yet reported which blocks → Fido Solutions Inc. 8820 Bathurst —
2013-05-08 506-993 not yet reported which blocks → Fido Solutions Inc. 8820 Miramichi —
2013-05-08 506-995 not yet reported which blocks → Fido Solutions Inc. 8820 Grand Falls —
2013-05-08 662-932 0–9 XXXall 10 · 7 holders which blocks → BRIGHTSPEED OF MISSISSIPPI, LLC 0458 OLIVE BRCH MS
2013-05-08 717-883 0–9 XXXall 10 · 9 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F FRYSTOWN PA
2013-05-08 720-478 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 4574 DENVER CO
2013-05-08 850-719 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 HAVANA FL
2013-05-08 870-401 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 PINE BLUFF AR
2013-05-08 873-825 not yet reported which blocks → Cooptel 818D Cookshire —
2013-05-07 579-799 not yet reported which blocks → Comwave Networks 160G Longueuil —
2013-05-07 779-229 6XXX which blocks → COMCAST IP PHONE, LLC 318J DEPUE IL
2013-05-07 902-988 not yet reported which blocks → Fido Solutions Inc. 8820 Yarmouth —
2013-05-07 902-990 not yet reported which blocks → Fido Solutions Inc. 8820 Bridgewater —
2013-05-07 902-991 not yet reported which blocks → Fido Solutions Inc. 8820 Amherst —
2013-05-07 902-992 not yet reported which blocks → Fido Solutions Inc. 8820 Summerside —
2013-05-07 902-993 not yet reported which blocks → Fido Solutions Inc. 8820 Kentville —
2013-05-07 902-995 not yet reported which blocks → Fido Solutions Inc. 8820 Antigonish —
2013-05-07 903-703 0XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLOSSOM TX
2013-05-06 209-276 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2013-05-06 213-293 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 01 CA
2013-05-06 252-748 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7555 ROCKYMOUNT NC
2013-05-06 352-765 0–9 XXXall 10 · 6 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L INVERNESS FL
2013-05-06 469-773 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 WAXAHACHIE TX
2013-05-06 646-687 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2013-05-06 774-415 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E AUBURN MA
2013-05-06 843-203 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHARLESTON SC
2013-05-02 306-308 not yet reported which blocks → TELUS Mobility 8303 Estevan —
2013-05-02 320-405 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HUTCHINSON MN
2013-05-02 506-978 not yet reported which blocks → TELUS Integrated Communications 2782 Saint John —
2013-05-02 506-979 not yet reported which blocks → TELUS Integrated Communications 2782 Sussex —
2013-05-02 509-578 0–9 XXXall 10 · 7 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 RICHLAND WA
2013-05-02 587-644 not yet reported which blocks → TELUS Mobility 8301 Fort McMurray —
2013-05-02 608-560 0XXX1XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CENTRAL STATE TEL. CO 0859 NECEDAH WI
2013-05-02 619-780 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2013-05-02 913-325 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2013-05-02 940-618 not yet reported which blocks → CHOICE WIRELESS, LC 3533 WICHITAFLS TX
2013-05-02 940-621 not yet reported which blocks → CHOICE WIRELESS, LC 3533 BURKBURNTT TX
2013-05-02 940-623 not yet reported which blocks → CHOICE WIRELESS, LC 3533 BOWIE TX
2013-05-02 940-625 not yet reported which blocks → CHOICE WIRELESS, LC 3533 HENRIETTA TX
2013-05-01 708-830 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-05-01 872-801 0XXX1XXX2XXX3XXX4XXX9XXX which blocks → T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-05-01 872-803 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-30 224-408 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J WILMETTE IL
2013-04-30 360-972 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E OLYMPIA WA
2013-04-30 405-339 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO 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.