NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2013-02-28 210-901 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J SANANTONIO TX
2013-02-28 270-557 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 PADUCAH KY
2013-02-28 469-508 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 DALLAS TX
2013-02-28 504-478 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2013-02-28 505-209 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 GRANTS NM
2013-02-28 681-343 not yet reported which blocks → COMCAST IP PHONE, LLC 318J PAW PAW WV
2013-02-28 910-469 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MT GILEAD NC
2013-02-28 910-637 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ABERDEEN NC
2013-02-27 217-205 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 911E MATTOON IL
2013-02-27 323-430 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2013-02-27 385-265 0–9 XXXall 10 · 5 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D AMERCNFORK UT
2013-02-27 602-545 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-27 602-785 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-27 602-921 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-27 607-677 0XXX1XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC - NY 932G BINGHAMTON NY
2013-02-27 774-405 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FRAMINGHAM MA
2013-02-27 774-414 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FRAMINGHAM MA
2013-02-27 801-666 0–9 XXXall 10 · 6 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2013-02-27 860-207 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WILLIMNTIC CT
2013-02-26 256-923 1XXX2XXX3XXX5XXX · 3 holders which blocks → PEOPLES TEL. CO., INC. 0314 CENTRE AL
2013-02-26 312-754 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 138G CHICGOZN01 IL
2013-02-26 615-647 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C NASHVILLE TN
2013-02-26 832-862 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ALVIN TX
2013-02-26 909-219 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COLTON CA
2013-02-25 270-599 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BOWLNGGREN KY
2013-02-25 386-225 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 PALM COAST FL
2013-02-25 425-363 0–9 XXXall 10 · 7 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 NORTH BEND WA
2013-02-25 469-509 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-02-25 579-225 not yet reported which blocks → TELUS Quebec 2243 St-Hyacinthe —
2013-02-25 579-226 not yet reported which blocks → TELUS Quebec 2243 Ste-Therese —
2013-02-25 681-208 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 SUMMERSVL WV
2013-02-25 681-443 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 FAIRMONT WV
2013-02-25 754-265 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C FTLAUDERDL FL
2013-02-25 873-407 not yet reported which blocks → TELUS Quebec 2243 La Tuque —
2013-02-23 747-225 0–9 XXXall 10 · 8 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SNFN PACM CA
2013-02-22 204-905 not yet reported which blocks → Bell Mobility 6574 Steinbach —
2013-02-22 210-763 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2013-02-22 210-803 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2013-02-22 276-329 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J TAZEWELL VA
2013-02-22 276-437 0–9 XXXall 10 · 6 holders which blocks → MOUNTAINET TELEPHONE COMPANY - VA 3185 NORTON VA
2013-02-22 438-397 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2013-02-22 438-398 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2013-02-22 480-492 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2013-02-22 480-519 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2013-02-22 513-760 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F LTL MIAMI OH
2013-02-21 314-449 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ST LOUIS MO
2013-02-21 321-337 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KISSIMMEE FL
2013-02-21 360-558 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
2013-02-21 407-269 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2013-02-21 469-345 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FORNEY TX

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.