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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 318-613 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALEXANDRIA LA
— 318-614 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
— 318-617 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
— 318-619 0XXX4XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALEXANDRIA LA
— 318-621 1XXX3XXX4XXX5XXX6XXX7XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-624 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HAYNESVL LA
— 318-627 1XXX8XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 COLFAX LA
— 318-628 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 WINNFIELD LA
— 318-629 not yet reported which blocks → CENTURYLINK COMMUNICATIONS LLC - LA 2896 SHREVEPORT LA
— 318-630 not yet reported which blocks → SPOK, INC. 6630 SHREVEPORT LA
— 318-631 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-632 1XXX3XXX7XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-633 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 DELTA LA
— 318-634 not yet reported which blocks → ELIZABETH TEL. CO. 0430 ELIZABETH LA
— 318-635 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-636 8XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-638 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-640 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALEXANDRIA LA
— 318-641 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALEXANDRIA LA
— 318-644 4XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 CALHOUN LA
— 318-645 1XXX3XXX8XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ZWOLLE LA
— 318-646 1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONTGOMERY LA
— 318-647 1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MER ROUGE LA
— 318-648 1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 WINNFIELD LA
— 318-649 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 COLUMBIA LA
— 318-650 5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 FERRIDAY LA
— 318-651 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-652 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NATCHITCHS LA
— 318-655 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C SHREVEPORT LA
— 318-659 5XXX7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 CALCASIEU LA
— 318-663 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NATCHITCHS LA
— 318-664 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ALEXANDRIA LA
— 318-665 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 STERLINGTN LA
— 318-669 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 BASTROP LA
— 318-671 2XXX3XXX4XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-673 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-675 9XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-676 2XXX4XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-680 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
— 318-681 3XXX8XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-682 0XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-683 7XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-686 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-687 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-688 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHREVEPORT LA
— 318-689 not yet reported which blocks → SPOK, INC. 6630 SHREVEPORT LA
— 318-697 1XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LOGANSPORT LA
— 318-698 not yet reported which blocks → CENTURYLINK COMMUNICATIONS LLC - LA 2896 SHREVEPORT LA
— 318-699 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
— 318-700 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX 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.