NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 559
TELEPORT COMMUNICATIONS AMERICA, LLC - CA 82
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2026-04-17 559-986-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2024-08-19 559-912-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2024-06-13 559-912-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2023-07-18 559-758-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PARLIER CA
2023-05-22 559-482-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 BURREL CA
2023-05-22 559-839-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 VISALIA CA
2022-12-09 559-774-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2022-09-02 559-807-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2022-09-02 559-807-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2022-09-02 559-807-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2022-09-02 559-807-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2022-09-02 559-807-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2022-04-25 559-752-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 TIPTON CA
2022-04-25 559-963-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 LATON CA
2022-02-15 559-867-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RIVERDALE CA
2021-06-30 559-769-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 WOODLAKE CA
2021-05-28 559-603-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2021-04-02 559-603-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2021-01-12 559-552-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2020-12-11 559-890-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2020-10-12 559-829-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SANJOAQUIN CA
2020-06-30 559-615-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PORTERVL CA
2020-04-15 559-507-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MADERA CA
2020-04-10 559-608-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 VISALIA CA
2020-03-09 559-729-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 AVENAL CA
2020-02-26 559-605-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 TULARE CA
2020-02-26 559-605-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 TULARE CA
2020-01-14 559-464-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 TERRABELLA CA
2019-10-07 559-749-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 VISALIA CA
2019-08-21 559-414-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CORCORAN CA
2019-05-10 559-413-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HANFORD CA
2019-04-08 559-605-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 TULARE CA
2019-03-15 559-539-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SPRINGVL CA
2019-02-07 559-550-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2018-02-28 559-823-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 ORANGECOVE CA
2017-11-06 559-550-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2017-10-04 559-701-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CLOVIS CA
2017-06-13 559-705-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2016-09-08 559-205-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 VISALIA CA
2016-06-20 559-835-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2016-04-13 559-656-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 TULARE CA
2016-04-13 559-656-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 TULARE CA
2016-02-02 559-538-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2015-11-17 559-424-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MENDOTA CA
2015-10-19 559-724-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2015-08-18 559-608-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 VISALIA CA
2014-08-27 559-538-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2014-01-07 559-821-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 COALINGA CA
2013-07-02 559-391-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 REEDLEY CA
2013-07-02 559-391-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 REEDLEY CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.