NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 572
ONVOY, LLC - OK 1
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-03-26 572-222 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → FRACTEL, LLC 965H PERKINS OK
2021-03-26 572-300 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H WEWOKA OK
2021-03-26 572-333 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H PAULS VLY OK
2021-03-26 572-356 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H MAYSVILLE OK
2021-03-26 572-400 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WANETTE OK
2021-03-26 572-444 0XXX4XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H NICOMAPARK OK
2021-03-26 572-465 0XXX1XXX4XXX5XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H WASHINGTON OK
2021-03-26 572-500 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H POCASSET OK
2021-03-26 572-529 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ALEX OK
2021-03-26 572-600 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J MAUD OK
2021-03-26 572-666 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H EL RENO OK
2021-03-26 572-777 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → WIRETAP TELECOM, LLC. 733J HARRAH OK
2021-03-26 572-800 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H WELLSTON OK
2021-03-26 572-888 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H PIEDMONT OK
2021-03-26 572-900 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H MERIDIAN OK
2021-03-26 572-999 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H GUTHRIE OK
— 572-210 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H CEMENT OK
— 572-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 572-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 572-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 572-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 572-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST OK
— 572-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 572-700 not yet reported which blocks → OK
— 572-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 572-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 572-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 572-950 not yet reported which blocks → OK
— 572-958 not yet reported which blocks → OK
— 572-959 not yet reported which blocks → OK
— 572-976 not yet reported which blocks → 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.