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 575
QWEST CORPORATION 77
ONVOY, LLC - NM 54
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 51
T-MOBILE USA, INC. 37
NEW CINGULAR WIRELESS PCS, LLC - IL 37
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
2022-01-14 575-467 0XXX1XXX2XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ANGEL FIRE NM
2022-01-11 575-293 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PENASCO NM
2022-01-11 575-426 0XXX1XXX3XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SPRINGER NM
2022-01-11 575-466 3XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JEMEZ SPG NM
2022-01-11 575-663 0XXX1XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SAN YSIDRO NM
2022-01-10 575-832 0XXX1XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TUCUMCARI NM
2021-12-17 575-270 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LAS CRUCES NM
2021-11-22 575-283 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ANTHONY NM
2021-11-17 575-280 0XXX1XXX2XXX3XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F QUESTA NM
2021-10-26 575-285 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2021-09-13 575-292 0XXX2XXX5XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 TIERRAAMRL NM
2021-09-01 575-284 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SILVERCITY NM
2021-08-25 575-465 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ROSWELL NM
2021-08-11 575-281 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2021-08-03 575-277 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAS CRUCES NM
2021-07-27 575-271 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CLOVIS NM
2021-07-19 575-261 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RESERVE NM
2021-07-19 575-269 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 QUEMADO NM
2021-05-06 575-260 0XXX1XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 RUIDOSODWN NM
2021-04-26 575-266 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 CARLSBAD NM
2021-04-06 575-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ALAMOGORDO NM
2021-03-24 575-334 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - NM 206F CHAPARRAL NM
2021-03-09 575-247 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ARTESIA NM
2021-02-16 575-246 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ROSWELL NM
2021-02-08 575-554 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F ALAMOGORDO NM
2021-02-08 575-665 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NM 206F HOBBS NM
2021-01-22 575-345 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H CANNON AFB NM
2021-01-07 575-248 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HATCH NM
2021-01-07 575-550 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F ROSWELL NM
2020-12-23 575-249 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F LAS CRUCES NM
2020-11-17 575-244 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ROSWELL NM
2020-09-10 575-346 2XXX3XXX · 2 holders which blocks → FRACTEL, LLC 965H CORONA NM
2020-09-03 575-786 7XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H RODEO NM
2020-09-03 575-842 3XXX5XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MAGDALENA NM
2020-09-03 575-945 0XXX2XXX3XXX5XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H LOGAN NM
2020-07-16 575-243 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ARTESIA NM
2020-06-16 575-240 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 TAOS NM
2020-06-03 575-766 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H EUNICE NM
2020-06-02 575-333 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H LOVINGTON NM
2020-04-21 575-259 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2019-12-16 575-213 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F ALAMOGORDO NM
2019-12-16 575-216 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NM 206F ANGEL FIRE NM
2019-12-16 575-237 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NM 206F CARLSBAD NM
2019-12-13 575-210 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NM 206F TUCUMCARI NM
2019-08-28 575-320 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF NEW MEXICO, LLC - NM 377H PORTALES NM
2019-08-28 575-338 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF NEW MEXICO, LLC - NM 377H LA MESA NM
2019-04-10 575-241 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HOBBS NM
2019-03-27 575-206 0XXX2XXX which blocks → CSC WIRELESS, LLC 425J TEXICO NM
2018-05-08 575-400 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F LINDRITH NM
2018-05-08 575-570 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - NM 206F CANJILON NM

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.