NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 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
2020-10-28 825-714 not yet reported which blocks → Bell Mobility 6574 Calgary —
2020-10-28 909-924 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2020-10-28 951-558 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-10-27 236-649 not yet reported which blocks → Bell West Inc. 2933 Parksville —
2020-10-27 236-673 not yet reported which blocks → Bell West Inc. 2933 Houston —
2020-10-27 236-674 not yet reported which blocks → Bell West Inc. 2933 Kitimat —
2020-10-27 236-675 not yet reported which blocks → Bell West Inc. 2933 Smithers —
2020-10-27 272-248 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J ASHLAND PA
2020-10-27 412-730 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J PTTSBGZON1 PA
2020-10-27 437-393 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-10-27 437-626 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-10-27 438-313 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-27 438-434 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-27 438-481 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-27 445-203 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D PHPHSBZN32 PA
2020-10-27 480-716 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 478J PHOENIX AZ
2020-10-27 509-512 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MOSES LAKE WA
2020-10-27 520-478 0XXX1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 AJO AZ
2020-10-27 564-202 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2020-10-27 571-479 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J LEESBURG VA
2020-10-27 959-220 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - CT 639C ESSEX CT
2020-10-27 959-566 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - CT 639C LEBANON CT
2020-10-26 231-273 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C EASTPORT MI
2020-10-26 231-278 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H HESPERIA MI
2020-10-26 231-304 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C BRUTUS MI
2020-10-26 236-641 not yet reported which blocks → Bell West Inc. 2933 Port Hardy —
2020-10-26 236-642 not yet reported which blocks → Bell West Inc. 2933 Chetwynd —
2020-10-26 236-643 not yet reported which blocks → Bell West Inc. 2933 Ucluelet —
2020-10-26 236-644 not yet reported which blocks → Bell West Inc. 2933 Hope —
2020-10-26 236-648 not yet reported which blocks → Bell West Inc. 2933 Chemainus —
2020-10-26 236-650 not yet reported which blocks → Bell West Inc. 2933 Oliver —
2020-10-26 236-651 not yet reported which blocks → Bell West Inc. 2933 Grand Forks —
2020-10-26 236-652 not yet reported which blocks → Bell West Inc. 2933 Princeton —
2020-10-26 236-654 not yet reported which blocks → Bell West Inc. 2933 Revelstoke —
2020-10-26 236-656 not yet reported which blocks → Bell West Inc. 2933 Burns Lake —
2020-10-26 236-657 not yet reported which blocks → Bell West Inc. 2933 Fort St. James —
2020-10-26 236-658 not yet reported which blocks → Bell West Inc. 2933 Vanderhoof —
2020-10-26 236-659 not yet reported which blocks → Bell West Inc. 2933 Mackenzie —
2020-10-26 325-322 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C LLANO TX
2020-10-26 346-448 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2020-10-26 412-941 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - PA 547E PTTSBGZON4 PA
2020-10-26 417-508 5XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POWELL MO
2020-10-26 417-602 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STELLA MO
2020-10-26 470-680 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E CUMMING GA
2020-10-26 470-690 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ROOPVILLE GA
2020-10-26 470-692 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2020-10-26 475-454 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CT 639C DANBURY CT
2020-10-26 516-834 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN02 NY
2020-10-26 517-271 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C NASHVILLE MI
2020-10-26 520-521 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J SAN MANUEL AZ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.