NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 405-644 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-645 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 CALVIN OK
— 405-647 not yet reported which blocks → SPOK, INC. 6630 OKLA CITY OK
— 405-649 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 MULHALL OK
— 405-650 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
— 405-652 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OKLA CITY OK
— 405-656 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 BINGER OK
— 405-659 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
— 405-660 not yet reported which blocks → SPOK, INC. 6630 OKLA CITY OK
— 405-661 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HINTON OK
— 405-663 not yet reported which blocks → HINTON TEL. CO. OF HINTON OK, INC. 1995 HYDRO OK
— 405-665 0XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 WYNNEWOOD OK
— 405-670 9XXX which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-671 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-672 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-677 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-678 not yet reported which blocks → CROSS WIRELESS, L.L.C. 148G STILLWATER OK
— 405-680 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-681 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-682 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-684 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-685 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-686 3XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-688 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-689 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J TUTTLE OK
— 405-690 not yet reported which blocks → SPOK, INC. 6630 OKLA CITY OK
— 405-691 9XXX which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-692 not yet reported which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-699 none assigned yet which blocks → PIONEER TEL. COOP., INC. 2018 KINGFISHER OK
— 405-700 not yet reported which blocks → OK
— 405-701 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J NORMAN OK
— 405-702 2XXX3XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-703 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MOORE OK
— 405-705 0XXX1XXX3XXX4XXX6XXX8XXX which blocks → ONVOY, LLC - OK 409F EDMOND OK
— 405-706 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-707 not yet reported which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-709 0XXX3XXX4XXX6XXX7XXX which blocks → ONVOY, LLC - OK 409F BETHANY OK
— 405-710 not yet reported which blocks → PAGE PLUS, INC. 9671 MOORE OK
— 405-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 405-713 3XXX which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-714 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 STILLWATER OK
— 405-715 not yet reported which blocks → SOUTHWESTERN BELL 9533 EDMOND OK
— 405-717 not yet reported which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-720 not yet reported which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-721 not yet reported which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-722 not yet reported which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-725 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H LUTHER OK
— 405-726 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J EDMOND OK
— 405-728 6XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-729 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 LOYAL OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.