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
2016-09-21 857-409 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2016-09-21 857-505 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BOSTON MA
2016-09-21 857-507 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2016-09-21 916-260 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2016-09-21 951-495 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-20 226-961 not yet reported which blocks → Fido Solutions Inc. 5643 Windsor —
2016-09-20 236-882 not yet reported which blocks → Fido Solutions Inc. 5643 Victoria —
2016-09-20 269-242 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PLAINWELL MI
2016-09-20 343-987 not yet reported which blocks → Fido Solutions Inc. 5643 Ottawa-Hull —
2016-09-20 409-240 0–9 XXXall 10 · 2 holders which blocks → SOUTHWESTERN BELL 9533 BEAUMONT TX
2016-09-20 437-981 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 437-982 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 437-983 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 437-984 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 437-985 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 437-986 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 437-987 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 437-988 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 437-989 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2016-09-20 563-207 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBUQUE IA
2016-09-20 628-212 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2016-09-20 628-214 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NOVATO CA
2016-09-20 628-215 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2016-09-20 628-216 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2016-09-20 669-214 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS NORTH CA
2016-09-20 727-509 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2016-09-20 727-601 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E CLEARWATER FL
2016-09-20 805-401 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OXNARD CA
2016-09-20 814-522 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 6 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C LINCOLNVL PA
2016-09-20 904-832 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 JACKSONVL FL
2016-09-20 940-308 0–9 XXXall 10 · 5 holders which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 KAMAY TX
2016-09-19 210-961 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SANANTONIO TX
2016-09-19 314-461 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
2016-09-19 314-926 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F KIRKWOOD MO
2016-09-19 417-421 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2016-09-19 425-659 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2016-09-19 510-514 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2016-09-19 573-509 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC - MO 093F ALTEBGFRHN MO
2016-09-19 573-923 0XXX1XXX2XXX4XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - MO 093F BLOOMFIELD MO
2016-09-19 612-505 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2016-09-19 612-517 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2016-09-19 616-489 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IONIA MI
2016-09-19 619-389 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SNDG SNDG CA
2016-09-19 628-210 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F INVERNESS CA
2016-09-19 651-502 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2016-09-19 669-212 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2016-09-19 763-501 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2016-09-16 423-856 0–9 XXXall 10 · 4 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2016-09-16 619-340 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA MESA CA
2016-09-16 845-310 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C WINGDALE 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.