NumberResearch Membership · Data 10/01/2026

Recent prefix assignments

374 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 10/01/2026

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, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 504-970 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX LA
— 504-972 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX LA
— 504-976 not yet reported which blocks → LA
— 504-988 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-999 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX LA
— 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
— 505-271 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-272 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-275 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-277 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-280 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-281 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-282 none assigned yet which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-284 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 10/01/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.