NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
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 —
2019-02-25 509-900 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J SPOKANE WA
2019-02-25 564-999 0–9 XXXall 10 · 7 holders which blocks → TERRA NOVA TELECOM INC. 145J OLYMPIA WA
2019-02-25 614-665 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F WESTERVL OH
2019-02-25 640-222 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J FLORENCE NJ
2019-02-25 719-500 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J COLORDOSPG CO
2019-02-25 720-657 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2019-02-25 828-609 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F CAROLEEN NC
2019-02-25 865-900 0–9 XXXall 10 · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J KNOXVILLE TN
2019-02-25 931-271 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MCMINNVL TN
2019-02-25 980-409 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F GROVER NC
2019-02-25 984-733 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F KNIGHTDALE NC
2019-02-22 319-900 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J CEDAR RPDS IA
2019-02-22 450-343 not yet reported which blocks → InnSysVoice Corp 383H Chomedey —
2019-02-22 581-472 not yet reported which blocks → ISP Telecom Inc. 4727 Rimouski —
2019-02-22 667-855 0XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J SALISBURY MD
2019-02-22 720-866 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J DENVER CO
2019-02-22 775-877 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J PAHRUMP NV
2019-02-22 913-900 0XXX1XXX3XXX9XXX · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J LANCASTER KS
2019-02-21 209-319 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E TRACY CA
2019-02-21 256-900 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J GADSDEN AL
2019-02-21 339-229 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WEYMOUTH MA
2019-02-21 339-800 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J ARLINGTON MA
2019-02-21 351-209 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J ACTON MA
2019-02-21 470-456 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2019-02-21 581-944 not yet reported which blocks → Videotron Ltd. 8306 East Broughton —
2019-02-21 581-979 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2019-02-21 607-309 0–9 XXXall 10 · 7 holders which blocks → EXIANT COMMUNICATIONS LLC 114J ENDICOTT NY
2019-02-21 646-995 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J NWYRCYZN01 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.