NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 405
COMCAST IP PHONE, LLC 41
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
2017-09-26 405-857 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NORMAN OK
2017-09-26 405-897 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WHEATLAND OK
2017-09-05 405-984 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ARCADIA OK
— 405-208 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-256 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MUSTANG OK
— 405-259 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NICOMAPARK OK
— 405-261 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J WHEATLAND OK
— 405-265 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J YUKON OK
— 405-281 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CHOCTAW OK
— 405-283 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PIEDMONT OK
— 405-285 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J EDMOND OK
— 405-286 4XXX6XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J BRITTON OK
— 405-293 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J GUTHRIE OK
— 405-294 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NOBLE OK
— 405-295 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J EL RENO OK
— 405-310 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NORMAN OK
— 405-455 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MIDWEST CY OK
— 405-463 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BRITTON OK
— 405-470 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BETHANY OK
— 405-509 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J EDMOND OK
— 405-510 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-513 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J EDMOND OK
— 405-522 not yet reported which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-600 0XXX2XXX4XXX5XXX8XXX which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-601 not yet reported which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-602 4XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-603 0XXX1XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BETHANY OK
— 405-604 1XXX7XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-605 9XXX which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-606 0XXX1XXX5XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-607 1XXX3XXX5XXX7XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BRITTON OK
— 405-608 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BRITTON OK
— 405-609 0XXX4XXX7XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J OKLA CITY OK
— 405-610 0XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MIDWEST CY 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
— 405-726 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J EDMOND OK
— 405-759 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MOORE OK
— 405-801 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NORMAN OK
— 405-849 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BRITTON OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.