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
2014-07-24 786-713 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C PERRINE FL
2014-07-24 906-914 2XXX4XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MENOMINEE MI
2014-07-24 928-295 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 SEDONA AZ
2014-07-24 970-500 0–9 XXXall 10 · 4 holders which blocks → NORTHERN COLORADO COMMUNICATIONS, LLC. - CO 312G WELDONA CO
2014-07-23 313-960 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-07-23 334-641 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F DEMOPOLIS AL
2014-07-23 343-888 not yet reported which blocks → Distributel 082E Ottawa-Hull —
2014-07-23 581-627 not yet reported which blocks → TELUS Quebec 2243 Chibougamau —
2014-07-23 646-605 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2014-07-23 803-745 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF SOUTH CAROLINA, LLC - SC 5344 LANCASTER SC
2014-07-23 807-994 not yet reported which blocks → Fido Solutions Inc. 5643 Fort Frances —
2014-07-23 807-995 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Dryden —
2014-07-23 873-379 not yet reported which blocks → TELUS Quebec 2243 Rouyn-Noranda —
2014-07-23 873-380 not yet reported which blocks → TELUS Quebec 2243 La Sarre —
2014-07-22 210-996 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2014-07-22 210-997 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2014-07-22 475-246 0–9 XXXwhole prefix which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2014-07-22 475-247 0–9 XXXwhole prefix which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2014-07-22 475-248 0–9 XXXwhole prefix which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 BRIDGEPORT CT
2014-07-22 475-249 0–9 XXXwhole prefix which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 OLDGRNWICH CT
2014-07-22 540-215 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - VA 138E BROADWAY VA
2014-07-22 915-229 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL PASO TX
2014-07-22 971-325 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2014-07-21 210-769 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 SANANTONIO TX
2014-07-21 224-508 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ELGIN IL
2014-07-21 289-509 not yet reported which blocks → Distributel 082E Whitby —
2014-07-21 415-960 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 BELVEDERE CA
2014-07-21 475-209 0–9 XXXall 10 · 6 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2014-07-21 587-473 not yet reported which blocks → TELUS 8084 Edmonton —
2014-07-21 615-721 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J FRANKLIN TN
2014-07-21 619-431 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNDG SNDG CA
2014-07-21 619-494 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CHULAVISTA CA
2014-07-21 626-624 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-07-21 626-734 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARCADIA CA
2014-07-21 626-861 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2014-07-21 650-665 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2014-07-21 709-962 not yet reported which blocks → Aliant Telecom (NF) 8085 Labrador City - Wabush —
2014-07-21 727-262 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2014-07-21 860-750 0–9 XXXall 10 · 6 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEWMILFORD CT
2014-07-21 860-994 0–9 XXXall 10 · 4 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
2014-07-18 385-231 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-07-18 470-261 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2014-07-18 502-642 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 GEORGETOWN KY
2014-07-18 559-753 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FRESNO CA
2014-07-18 626-658 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PSDN PSDN CA
2014-07-18 727-304 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2014-07-18 808-726 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2014-07-18 828-547 0–9 XXXall 10 · 5 holders which blocks → BALSAMWEST FIBERNET, LLC - NC 801D CASHIERS NC
2014-07-18 929-284 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN15 NY
2014-07-18 939-224 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR

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.