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
2022-01-27 337-846 0XXX1XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JEANERETTE LA
2021-12-07 337-895 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J LAFAYETTE LA
2021-10-19 337-567 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BREAUX BDG LA
2021-08-12 337-557 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → AIRUS, INC. - LA 477H LAFAYETTE LA
2021-06-15 337-595 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F ABBEVILLE LA
2021-06-04 337-556 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F CHURCH PT LA
2021-04-14 337-901 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H LAFAYETTE LA
2021-04-01 337-554 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J LAFAYETTE LA
2021-02-10 337-553 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 GUEYDAN LA
2021-01-29 337-547 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEW IBERIA LA
2020-09-01 337-545 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C CENTERVL LA
2020-04-06 337-512 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2020-04-06 337-525 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DE QUINCY LA
2020-03-23 337-487 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2019-12-16 337-486 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STMARTINVL LA
2019-12-13 337-688 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LK CHARLES LA
2019-11-20 337-483 0XXX1XXX8XXX · 3 holders which blocks → TELNYX LLC 073H LAFAYETTE LA
2019-11-05 337-270 0–9 XXXall 10 · 2 holders which blocks → EXIANT COMMUNICATIONS LLC 114J LAFAYETTE LA
2019-09-05 337-677 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LK CHARLES LA
2019-08-05 337-455 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BREAUX BDG LA
2019-08-05 337-472 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - LA 749E MAMOU LA
2019-08-05 337-473 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - LA 749E RAGLEY LA
2019-08-05 337-481 0XXX4XXX7XXX · 2 holders which blocks → ONVOY, LLC - LA 749E STARKS LA
2019-05-20 337-877 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H VINTON LA
2019-03-28 337-549 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J LK CHARLES LA
2018-09-26 337-469 0–9 XXXall 10 · 7 holders which blocks → LAFAYETTE CITY-PARISH CONSOLIDATED GOVERNMENT - LA 9002 CARENCRO LA
2018-03-13 337-399 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → VONAGE AMERICA LLC 197D LAFAYETTE LA
2017-12-20 337-450 0–9 XXXall 10 · 5 holders which blocks → LAFAYETTE CITY-PARISH CONSOLIDATED GOVERNMENT - LA 9002 YOUNGSVL LA
2017-12-14 337-361 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 8 holders which blocks → COMCAST IP PHONE, LLC 318J ERATH LA
2017-12-14 337-398 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J CROWLEY LA
2017-12-05 337-283 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ABBEVILLE LA
2017-09-26 337-345 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E LAFAYETTE LA
2017-03-30 337-282 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C GUEYDAN LA
2017-03-08 337-382 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ABBEVILLE LA
2016-10-20 337-518 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → DETEL WIRELESS, LLC - LA 650C VL PLATTE LA
2016-06-29 337-612 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC. 4930 IOTA LA
2016-06-29 337-614 0XXX1XXX2XXX4XXX5XXX6XXX · 4 holders which blocks → LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC. 4930 CANKTON LA
2016-06-23 337-703 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C LAFAYETTE LA
2016-03-18 337-243 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E CENTERVL LA
2016-03-18 337-420 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BALDWIN LA
2016-03-01 337-561 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E DUSON LA
2016-02-22 337-609 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LAFAYETTE LA
2016-01-15 337-607 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SULPHUR LA
2015-11-23 337-242 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STMARTINVL LA
2015-10-07 337-571 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C LAFAYETTE LA
2015-09-15 337-600 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E ABBEVILLE LA
2015-05-15 337-520 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARENCRO LA
2015-03-20 337-900 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E SULPHUR LA
2015-02-24 337-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E ABBEVILLE LA
2015-01-22 337-603 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EUNICE 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.