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
2014-02-28 512-960 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2014-02-28 520-447 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E TUCSON AZ
2014-02-28 520-775 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2014-02-28 586-225 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CENTERLINE MI
2014-02-28 602-892 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2014-02-28 615-607 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - TN 6278 GREENGROVE TN
2014-02-28 669-228 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SAN MARTIN CA
2014-02-28 669-232 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LOS GATOS CA
2014-02-28 682-207 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 FORT WORTH TX
2014-02-28 747-228 0–9 XXXall 10 · 6 holders which blocks → CONNECTTO COMMUNICATIONS, INC. - CA 863D GLENDALE CA
2014-02-28 832-930 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2014-02-28 865-339 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F POWELL TN
2014-02-28 937-786 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GREENVILLE OH
2014-02-28 956-435 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BROWNSVL TX
2014-02-27 205-774 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F BESSEMER AL
2014-02-27 346-720 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-721 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-722 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-723 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-725 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-726 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-727 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-728 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 423-551 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHATTNOOGA TN
2014-02-27 540-699 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J STAFFORD VA
2014-02-27 580-755 0XXX1XXX5XXX7XXX8XXX · 5 holders which blocks → UNITED STATES CELLULAR - OK 6272 RANDLETT OK
2014-02-27 608-422 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - WI 6274 MADISON WI
2014-02-27 865-333 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J KNOXVILLE TN
2014-02-27 901-425 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MEMPHIS TN
2014-02-27 939-219 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2014-02-27 939-429 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2014-02-27 939-488 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2014-02-26 205-740 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F CORDOVA AL
2014-02-26 281-967 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2014-02-26 309-205 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BLOOMINGTN IL
2014-02-26 407-630 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 ORLANDO FL
2014-02-26 413-310 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2014-02-26 502-530 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 LA GRANGE KY
2014-02-26 513-592 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CINCINNATI OH
2014-02-26 813-203 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPAEST FL
2014-02-26 901-512 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MEMPHIS TN
2014-02-26 904-479 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J JACKSONVL FL
2014-02-26 910-662 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J WILMINGTON NC
2014-02-26 931-214 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 GAINESBORO TN
2014-02-26 937-762 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DAYTON OH
2014-02-25 306-556 not yet reported which blocks → TELUS Integrated Communications 2782 Moose Jaw —
2014-02-25 306-557 not yet reported which blocks → TELUS Integrated Communications 2782 Prince Albert —
2014-02-25 306-706 not yet reported which blocks → SaskTel Mobility 9868 Raymore —

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.