NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 21
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
— 318-307 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
— 318-308 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALEXANDRIA LA
— 318-309 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BLANCHARD LA
— 318-310 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - LA 749E POLLOCK LA
— 318-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX LA
— 318-322 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-323 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-324 7XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-325 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-326 1XXX which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 PL DEALING LA
— 318-327 0XXX2XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-329 6XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-330 0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-331 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
— 318-335 5XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 OAKDALE LA
— 318-336 1XXX2XXX3XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 VIDALIA LA
— 318-338 0XXX1XXX6XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-339 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 JONESVILLE LA
— 318-340 2XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-342 4XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-343 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-345 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-346 1XXX3XXX5XXX8XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BUNKIE LA
— 318-347 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
— 318-348 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
— 318-352 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NATCHITCHS LA
— 318-353 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LISBON LA
— 318-354 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NATCHITCHS LA
— 318-355 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
— 318-356 7XXX8XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NATCHITCHS LA
— 318-357 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NATCHITCHS LA
— 318-358 not yet reported which blocks → ELIZABETH TEL. CO. 0430 PITKIN LA
— 318-361 6XXX8XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-362 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-366 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
— 318-368 1XXX6XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 FARMERVL LA
— 318-370 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F DRY PRONG LA
— 318-371 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MINDEN LA
— 318-372 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
— 318-373 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E MONTGOMERY LA
— 318-375 8XXX which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 VIVIAN LA
— 318-376 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
— 318-377 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MINDEN LA
— 318-378 5XXX7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 BELCHER LA
— 318-379 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NATCHITCHS LA
— 318-380 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
— 318-381 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
— 318-382 2XXX3XXX5XXX6XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MINDEN LA
— 318-385 1XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ARCADIA LA
— 318-386 1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONTEREY LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.