NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
— 256-844 3XXX5XXX7XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 FORT PAYNE AL
— 256-845 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 FORT PAYNE AL
— 256-846 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 ANNISTON AL
— 256-847 5XXX6XXX7XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ANNISTON AL
— 256-848 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ANNISTON AL
— 256-851 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-852 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-853 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F DADEVILLE AL
— 256-855 not yet reported which blocks → SPOK, INC. 6630 HUNTSVILLE AL
— 256-858 1XXX7XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-859 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-864 4XXX5XXX6XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-872 7XXX8XXX · 2 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 SYLACAUGA AL
— 256-874 not yet reported which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ATHENS AL
— 256-876 not yet reported which blocks → CENTURYLINK COMMUNICATIONS LLC - AL 7451 HUNTSVILLE AL
— 256-878 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALBERTVL AL
— 256-880 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-881 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-882 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-883 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-885 5XXX6XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-887 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J HANCEVILLE AL
— 256-890 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-891 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALBERTVL AL
— 256-892 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 OHATCHEE AL
— 256-894 0XXX1XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALBERTVL AL
— 256-895 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-896 1XXX which blocks → WINDSTREAM ALABAMA, INC. 0302 CAMP HILL AL
— 256-898 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → AT&T - LOCAL 7421 DECATUR AL
— 256-899 0XXX1XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 RAINSVILLE AL
— 256-905 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MOULTON AL
— 256-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 256-912 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F SCOTTSBORO AL
— 256-917 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CULLMAN AL
— 256-920 not yet reported which blocks → SPOK, INC. 6630 HUNTSVILLE AL
— 256-922 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-927 not yet reported which blocks → PEOPLES TEL. CO., INC. 0314 CENTRE AL
— 256-931 not yet reported which blocks → BRINDLEE MOUNTAIN TELEPHONE LLC 0283 ARAB AL
— 256-947 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 HUNTSVILLE AL
— 256-950 not yet reported which blocks → AL
— 256-955 not yet reported which blocks → CENTURYLINK COMMUNICATIONS LLC - AL 7451 HUNTSVILLE AL
— 256-958 not yet reported which blocks → AL
— 256-959 not yet reported which blocks → AL
— 256-961 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 MADISON AL
— 256-962 5XXX6XXX7XXX8XXX · 3 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 CULLMAN AL
— 256-963 0XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-964 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-971 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
— 256-972 7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 CENTRE AL
— 256-974 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MOULTON AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.