NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

372 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-03-04 406-919 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J BELGRADE MT
2019-03-04 506-889 not yet reported which blocks → TELUS Mobility 8303 Moncton —
2019-03-04 573-843 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 CARUTHRSVL MO
2019-03-04 701-507 0–9 XXXwhole prefix which blocks → LTE WIRELESS, INC. - ND 410J ROLETTE ND
2019-03-04 707-316 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DIXON CA
2019-03-04 737-256 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2019-03-04 989-877 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J SAGINAW MI
2019-03-01 412-815 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PTTSBGZON1 PA
2019-03-01 463-800 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J INDIANAPLS IN
2019-03-01 470-457 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2019-03-01 484-630 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F W CHESTER PA
2019-03-01 616-273 0XXX1XXX2XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MARNE MI
2019-03-01 737-255 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J AUSTIN TX
2019-03-01 786-669 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2019-03-01 854-203 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA SC- LLC 635C KINGSTREE SC
2019-03-01 856-450 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J BEAVER BRK NJ
2019-03-01 862-339 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J NEWARK NJ
2019-02-28 385-302 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2019-02-28 469-695 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2019-02-28 616-385 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G KENT CITY MI
2019-02-28 757-916 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J NRFOLKZON2 VA
2019-02-28 802-308 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VT 9450 FAIR HAVEN VT
2019-02-28 804-575 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BETHIA VA
2019-02-28 804-664 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J RICHMOND VA
2019-02-28 813-556 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2019-02-28 816-601 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E KANSASCITY MO
2019-02-28 858-290 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DEL MAR CA
2019-02-28 910-517 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NC 638E ROCKINGHAM NC
2019-02-28 971-348 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2019-02-27 231-257 0XXX4XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F LAKE CITY MI
2019-02-27 249-575 not yet reported which blocks → Bell Mobility 6574 Gogama —
2019-02-27 314-798 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2019-02-27 352-626 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WILDWOOD FL
2019-02-27 407-783 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C EASTORANGE FL
2019-02-27 657-372 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2019-02-27 909-716 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 POMONA CA
2019-02-26 309-877 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J PEORIA IL
2019-02-26 314-759 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2019-02-26 407-768 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E ORLANDO FL
2019-02-26 586-900 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J MT CLEMENS MI
2019-02-26 616-900 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J GRAND RPDS MI
2019-02-26 701-877 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J BISMARCK ND
2019-02-26 731-280 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F SHILOH TN
2019-02-25 331-260 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 DOWNERSGRV IL
2019-02-25 385-400 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J OGDEN UT
2019-02-25 430-253 2XXX6XXX9XXX · 3 holders which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 FAIRFIELD TX
2019-02-25 438-525 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2019-02-25 438-526 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2019-02-25 438-527 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2019-02-25 450-514 not yet reported which blocks → InnSysVoice Corp 383H Laval-Ouest —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.