NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2013-03-04 832-787 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 HSTNSUBURB TX
2013-03-04 843-702 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G FLORENCE SC
2013-03-04 845-745 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MAHOPAC NY
2013-03-04 850-704 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G PANAMACITY FL
2013-03-04 850-760 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G PENSACOLA FL
2013-03-04 915-206 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 551G EL PASO TX
2013-03-04 916-246 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM NORTH CA
2013-03-04 917-717 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN10 NY
2013-03-04 917-979 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN15 NY
2013-03-04 940-217 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G WICHITAFLS TX
2013-03-01 252-262 1XXX2XXX3XXX4XXX6XXX7XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MOSS HILL NC
2013-03-01 336-652 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K KIMESVILLE NC
2013-03-01 365-800 not yet reported which blocks → Iristel Inc. 154E Oshawa —
2013-03-01 406-878 2XXX8XXX · 2 holders which blocks → NUSO, LLC 732J GREATFALLS MT
2013-03-01 437-800 not yet reported which blocks → Iristel Inc. 154E Toronto —
2013-03-01 450-345 not yet reported which blocks → 9164-3122 Quebec inc 843D Pierreville —
2013-03-01 469-513 0–9 XXXall 10 · 6 holders which blocks → INTEGRATED PATH COMMUNICATIONS, LLC - TX 951G DALLAS TX
2013-03-01 512-717 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F AUSTIN TX
2013-03-01 587-589 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2013-03-01 587-590 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2013-03-01 609-901 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 NEW EGYPT NJ
2013-03-01 705-915 not yet reported which blocks → Comwave Networks 160G Barrie —
2013-03-01 720-613 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUDSON CO
2013-03-01 737-333 0–9 XXXall 10 · 3 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D AUSTIN TX
2013-03-01 862-304 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 PASSAIC NJ
2013-03-01 979-207 0–9 XXXwhole prefix which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BRYAN TX
2013-02-28 208-497 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID 678B IDAHOFALLS ID
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

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.