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 337
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 143
NEW CINGULAR WIRELESS PCS, LLC - GA 98
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 53
PAETEC ITEL, LLC 34
BRIGHTSPEED OF LOUISIANA, LLC 33
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
— 337-537 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LEESVILLE LA
— 337-538 not yet reported which blocks → CAMERON TEL CO 0425 GRANDCHNIR LA
— 337-539 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E GUEYDAN LA
— 337-540 none assigned yet which blocks → METROPCS, INC. 5562 LK CHARLES LA
— 337-542 not yet reported which blocks → CAMERON TEL CO 0425 CREOLE LA
— 337-543 1XXX2XXX4XXX5XXX8XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAWTELL LA
— 337-546 2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 EUNICE LA
— 337-550 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 EUNICE LA
— 337-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST LA
— 337-558 not yet reported which blocks → CAMERON TEL CO 0425 CARLYSS LA
— 337-559 0XXX1XXX5XXX8XXX · 4 holders which blocks → ONVOY, LLC - LA 749E SWEET LAKE LA
— 337-560 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEW IBERIA LA
— 337-562 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-564 0–9 XXXall 10 · 6 holders which blocks → CEBRIDGE TELECOM LA, LLC D/B/A SUDDENLINK COMM LA 260H LK CHARLES LA
— 337-565 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CARENCRO LA
— 337-566 1XXX5XXX6XXX8XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 KROTZ SPG LA
— 337-569 not yet reported which blocks → CAMERON TEL CO 0425 JOHNSOBYOU LA
— 337-570 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-572 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAFAYETTE LA
— 337-577 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
— 337-578 5XXX6XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BALDWIN LA
— 337-579 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JEANERETTE LA
— 337-580 6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EUNICE LA
— 337-581 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
— 337-582 not yet reported which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 IOWA LA
— 337-583 not yet reported which blocks → CAMERON TEL CO 0425 CARLYSS LA
— 337-584 not yet reported which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 ELTON LA
— 337-585 1XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 PORT BARRE LA
— 337-587 3XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 THORNWELL LA
— 337-588 7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 LACASSINE LA
— 337-589 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 VINTON LA
— 337-592 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KROTZ SPG LA
— 337-593 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAFAYETTE LA
— 337-594 0XXX2XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 OPELOUSAS LA
— 337-596 not yet reported which blocks → SPOK, INC. 6630 LK CHARLES LA
— 337-598 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SWEET LAKE LA
— 337-599 8XXX which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 PINEPRAIRI LA
— 337-606 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NEW IBERIA LA
— 337-608 8XXX9XXX which blocks → PAETEC ITEL, LLC 829J NEW IBERIA LA
— 337-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX LA
— 337-616 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 JENNINGS LA
— 337-622 not yet reported which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 HAYES LA
— 337-623 1XXX2XXX3XXX6XXX7XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MELVILLE LA
— 337-625 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SULPHUR LA
— 337-626 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SULPHUR LA
— 337-639 not yet reported which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 OBERLIN LA
— 337-642 not yet reported which blocks → KAPLAN TEL. CO. 0432 FORKED IS LA
— 337-643 not yet reported which blocks → KAPLAN TEL. CO. 0432 KAPLAN LA
— 337-652 not yet reported which blocks → KAPLAN TEL. CO. 0432 KAPLAN LA
— 337-653 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LEESVILLE LA

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.