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
2001-05-08 505-232 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-05-08 505-254 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-05-08 505-255 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-05-08 505-256 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-05-08 505-260 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-05-08 505-262 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-05-08 505-265 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-05-08 505-266 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-05-08 505-268 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
2001-04-17 505-603 3XXX4XXX5XXX6XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA FE NM
2001-04-16 505-304 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
2001-03-16 505-216 2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SANTA FE NM
2001-03-16 505-217 4XXX5XXX6XXX8XXX which blocks → PAETEC ITEL, LLC 829J ALBUQURQUE NM
— 505-203 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
— 505-204 6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA FE NM
— 505-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NM
— 505-212 not yet reported which blocks → LEVEL 3 TELECOM OF NEW MEXICO, LLC - NM 7457 ALBUQURQUE NM
— 505-213 not yet reported which blocks → LEVEL 3 TELECOM OF NEW MEXICO, LLC - NM 7457 ALBUQURQUE NM
— 505-214 not yet reported which blocks → LEVEL 3 TELECOM OF NEW MEXICO, LLC - NM 7457 ALBUQURQUE NM
— 505-220 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-221 2XXX5XXX6XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-222 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-223 none assigned yet which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-224 none assigned yet which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-228 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-229 not yet reported which blocks → SELECTPATH, INC. 6756 ALBUQURQUE NM
— 505-231 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA FE NM
— 505-235 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-237 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-238 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-239 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-240 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 GRANTS NM
— 505-241 9XXX which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-242 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-243 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-244 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-245 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-246 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-247 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-248 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-249 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-250 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-251 not yet reported which blocks → SPOK, INC. 6630 ALBUQURQUE NM
— 505-252 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-259 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-261 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
— 505-263 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-264 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-269 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-270 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 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.