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 505
QWEST CORPORATION 184
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 98
NEW CINGULAR WIRELESS PCS, LLC 77
T-MOBILE USA, INC. 65
ONVOY, LLC - NM 54
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
2018-02-23 505-814 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2018-01-12 505-521 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2017-09-25 505-785 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D ALBUQURQUE NM
2017-09-01 505-378 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H ALBUQURQUE NM
2017-03-09 505-666 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H SANTA FE NM
2017-01-24 505-361 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ALBUQURQUE NM
2017-01-16 505-772 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 SANTA FE NM
2016-12-15 505-494 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H ALBUQURQUE NM
2016-11-23 505-347 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2016-10-06 505-387 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2016-09-14 505-737 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2016-09-08 505-208 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW MEXICO, LLC - NM 377H ALBUQURQUE NM
2016-08-16 505-595 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALBUQURQUE NM
2016-08-02 505-317 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALBUQURQUE NM
2016-08-02 505-365 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F SANTA FE NM
2016-06-29 505-356 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GRANTS NM
2016-05-26 505-318 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2016-03-08 505-308 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2016-03-07 505-305 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2016-03-03 505-587 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F LAS VEGAS NM
2016-03-01 505-295 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2016-02-03 505-582 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ALBUQURQUE NM
2016-01-28 505-355 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM 7464 ALBUQURQUE NM
2015-12-15 505-557 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SANTA FE NM
2015-11-20 505-207 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2015-11-09 505-337 0–9 XXXall 10 · 8 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2015-09-25 505-389 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW MEXICO, LLC - NM 377H ALBUQURQUE NM
2015-08-28 505-910 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2015-08-13 505-300 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2015-07-23 505-544 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2015-06-05 505-539 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALBUQURQUE NM
2015-06-05 505-675 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F FARMINGTON NM
2015-04-20 505-313 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2015-04-15 505-309 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F LOS ALAMOS NM
2015-03-19 505-636 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J AZTEC NM
2015-03-13 505-589 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 ALBUQURQUE NM
2015-03-11 505-588 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ALBUQURQUE NM
2015-02-23 505-297 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2015-02-10 505-445 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALBUQURQUE NM
2015-01-29 505-900 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2015-01-22 505-585 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2014-10-22 505-485 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2014-10-02 505-303 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA FE NM
2014-09-19 505-545 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ALBUQURQUE NM
2014-09-15 505-738 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF NEW MEXICO, LLC - NM 377H ALBUQURQUE NM
2014-09-15 505-985 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ALBUQURQUE NM
2014-06-17 505-415 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2014-06-12 505-322 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
2014-05-21 505-339 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2014-05-20 505-302 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALBUQURQUE 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.