NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 956
8X8, INC. 1
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
2021-05-10 956-922 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LA FERIA TX
2021-05-07 956-695 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H SAN BENITO TX
2021-04-19 956-673 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PHARR TX
2021-04-16 956-637 0–9 XXXall 10 · 4 holders which blocks → AT&T - LOCAL 7421 RIO HONDO TX
2021-04-12 956-634 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C MERCEDES TX
2021-04-12 956-937 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAREDO TX
2021-01-25 956-952 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H LAREDO TX
2021-01-25 956-964 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H ENCINAL TX
2021-01-22 956-629 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 LAREDO TX
2021-01-22 956-697 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C PORTISABEL TX
2021-01-22 956-856 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H WESLACO TX
2021-01-14 956-644 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ZAPATA TX
2021-01-14 956-833 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MISSION TX
2021-01-14 956-866 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BROWNSVL TX
2021-01-08 956-613 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ROMA TX
2020-12-22 956-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MCALLEN TX
2020-12-08 956-910 0XXX2XXX8XXX9XXX · 2 holders which blocks → NUSO, LLC 478J HARLINGEN TX
2020-11-02 956-604 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 BROWNSVL TX
2020-10-19 956-596 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BROWNSVL TX
2020-10-19 956-597 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DONNA TX
2020-10-19 956-957 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C EDINBURG TX
2020-10-16 956-595 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCALLEN TX
2020-09-28 956-594 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J BROWNSVL TX
2020-09-23 956-593 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WESLACO TX
2020-09-04 956-591 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MISSION TX
2020-09-04 956-656 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 ZAPATA TX
2020-09-02 956-576 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 BROWNSVL TX
2020-09-01 956-575 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 MISSION TX
2020-08-28 956-558 0–9 XXXall 10 · 3 holders which blocks → STPCS JOINT VENTURE, LLC 4290 MCALLEN TX
2020-08-19 956-556 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LOSFRESNOS TX
2020-07-21 956-552 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LAREDO TX
2020-07-10 956-733 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WESLACO TX
2020-07-10 956-955 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LAREDO TX
2020-06-18 956-946 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MISSION TX
2020-06-04 956-654 2XXX3XXX6XXX7XXX · 3 holders which blocks → CSC WIRELESS, LLC 425J HARLINGEN TX
2020-05-13 956-538 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNSVL TX
2020-04-06 956-531 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J LAREDO TX
2020-03-03 956-528 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
2020-02-11 956-505 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNSVL TX
2020-02-11 956-526 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DOLORES TX
2020-01-14 956-484 0–9 XXXall 10 · 3 holders which blocks → STPCS JOINT VENTURE, LLC 4290 BROWNSVL TX
2019-12-02 956-506 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H HARLINGEN TX
2019-11-27 956-482 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
2019-10-25 956-710 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H HARLINGEN TX
2019-10-17 956-479 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNSVL TX
2019-09-18 956-394 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
2019-08-27 956-877 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MCALLEN TX
2019-08-27 956-933 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H MISSION TX
2019-08-26 956-677 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H HARLINGEN TX
2019-08-26 956-977 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H LAREDO TX

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.