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 256
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 180
NEW CINGULAR WIRELESS PCS, LLC - GA 114
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 84
PAETEC ITEL, LLC 58
POWERTEL BIRMINGHAM LICENSES, INC. 49
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
2025-05-15 256-271 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2023-07-12 256-209 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DECATUR AL
2023-05-25 256-938 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 DECATUR AL
2023-05-24 256-205 5XXX which blocks → ONVOY SPECTRUM, LLC 624H WADLEY AL
2023-05-23 256-256 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H HUNTSVILLE AL
2023-03-31 256-988 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUNTSVILLE AL
2023-03-24 256-994 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 DECATUR AL
2023-02-14 256-993 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J HUNTSVILLE AL
2023-02-09 256-992 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2023-01-24 256-991 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F ATHENS AL
2023-01-13 256-989 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCOTTSBORO AL
2022-12-01 256-986 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DECATUR AL
2022-11-10 256-984 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2022-10-14 256-983 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCOTTSBORO AL
2022-09-13 256-981 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J CULLMAN AL
2022-09-13 256-982 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J ANNISTON AL
2022-08-12 256-969 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J HUNTSVILLE AL
2022-07-21 256-965 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F HARTSELLE AL
2022-07-12 256-954 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 ANNISTON AL
2022-06-22 256-932 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HUNTSVILLE AL
2022-06-03 256-491 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2022-05-19 256-243 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GUNTERSVL AL
2022-03-04 256-966 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SCOTTSBORO AL
2022-02-22 256-968 0XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LINEVILLE AL
2021-12-28 256-953 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HUNTSVILLE AL
2021-12-17 256-951 0–9 XXXall 10 · 4 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ARAB AL
2021-12-14 256-949 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ANNISTON AL
2021-11-18 256-948 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCOTTSBORO AL
2021-11-15 256-942 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2021-11-11 256-941 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DECATUR AL
2021-09-30 256-940 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F JACKSONVL AL
2021-09-24 256-936 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC. - AL 476H HUNTSVILLE AL
2021-09-24 256-939 0–9 XXXall 10 · 2 holders which blocks → AIRUS, INC. - AL 476H CULLMAN AL
2021-09-20 256-930 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CULLMAN AL
2021-09-20 256-934 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J HUNTSVILLE AL
2021-09-03 256-915 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E CULLMAN AL
2021-09-03 256-916 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E DECATUR AL
2021-09-03 256-918 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E MASSEY AL
2021-09-03 256-921 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E TALLADEGA AL
2021-09-03 256-928 0XXX1XXX2XXX3XXX6XXX · 4 holders which blocks → ONVOY, LLC - AL 604E GAYLESVL AL
2021-08-27 256-909 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HARTSELLE AL
2021-08-10 256-904 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FLORENCE AL
2021-07-26 256-956 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E FLORENCE AL
2021-06-23 256-903 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CULLMAN AL
2021-05-17 256-902 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 RUSSELLVL AL
2021-04-27 256-889 0–9 XXXall 10 · 3 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ARAB AL
2021-04-17 256-879 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H SYLACAUGA AL
2021-03-25 256-893 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J HUNTSVILLE AL
2021-03-17 256-875 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J HANCEVILLE AL
2021-03-03 256-866 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AL 604E KILLEN AL

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.