NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
— 254-954 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX TX
— 254-955 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX TX
— 254-958 not yet reported which blocks → TX
— 254-959 not yet reported which blocks → TX
— 254-965 not yet reported which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 STEPHENVL TX
— 254-967 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STEPHENVL TX
— 254-968 not yet reported which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 STEPHENVL TX
— 254-976 not yet reported which blocks → TX
— 254-977 6XXX7XXX8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 STEPHENVL TX
— 254-982 8XXX which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 LITTLE RIV TX
— 254-983 8XXX which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 HEIDENHEMR TX
— 254-984 9XXX which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 OENAVILLE TX
— 254-985 6XXX which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 ZABCIKVL TX
— 254-986 none assigned yet which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 MOFFAT TX
— 254-993 0XXX which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 MOUNT CALM TX
— 256-201 2XXX5XXX7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HEFLIN AL
— 256-204 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX AL
— 256-207 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SYLACAUGA AL
— 256-208 3XXX5XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SYLACAUGA AL
— 256-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 256-212 0XXX6XXX7XXX8XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALEXANDRCY AL
— 256-213 0XXX1XXX6XXX7XXX8XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-214 3XXX4XXX5XXX7XXX8XXX9XXX which blocks → METROPCS, INC. 5562 DECATUR AL
— 256-215 1XXX2XXX6XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALEXANDRCY AL
— 256-216 4XXX7XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ATHENS AL
— 256-217 3XXX4XXX5XXX7XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-218 not yet reported which blocks → BRIGHTSPEED OF ALABAMA, LLC - SOUTHERN 9788 SCOTTSBORO AL
— 256-219 not yet reported which blocks → SPOK, INC. 6630 HUNTSVILLE AL
— 256-220 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-221 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 DECATUR AL
— 256-223 3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 TALLADEGA AL
— 256-225 not yet reported which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ANNISTON AL
— 256-226 6XXX8XXX · 2 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ALBERTVL AL
— 256-227 not yet reported which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 DECATUR AL
— 256-228 2XXX5XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF ALABAMA, LLC - SOUTHERN 9788 SECTION AL
— 256-229 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LEXINGTON AL
— 256-230 4XXX7XXX8XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ATHENS AL
— 256-231 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ANNISTON AL
— 256-232 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ATHENS AL
— 256-233 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ATHENS AL
— 256-234 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALEXANDRCY AL
— 256-235 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ANNISTON AL
— 256-236 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ANNISTON AL
— 256-237 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ANNISTON AL
— 256-238 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ANNISTON AL
— 256-239 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ANNISTON AL
— 256-240 0XXX1XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ANNISTON AL
— 256-241 not yet reported which blocks → PAETEC ITEL, LLC 829J ANNISTON AL
— 256-244 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCOTTSBORO AL
— 256-245 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SYLACAUGA AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.