NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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 580
CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 36
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
2018-10-29 580-387-7XXX 7000–7999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 TISHOMINGO OK
2018-10-26 580-387-3XXX 3000–3999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 TISHOMINGO OK
2018-10-26 580-387-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 TISHOMINGO OK
2010-11-08 580-721-5XXX 5000–5999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 MARLOW OK
2008-09-19 580-242-9XXX 9000–9999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 ENID OK
2008-09-19 580-475-9XXX 9000–9999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 DUNCAN OK
2006-10-31 580-354-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 LAWTON OK
2006-10-31 580-395-5XXX 5000–5999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 MEDFORD OK
2006-08-25 580-369-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 DAVIS OK
2005-09-27 580-229-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 HEALDTON OK
2005-09-27 580-759-7XXX 7000–7999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 STRATFORD OK
2005-09-27 580-857-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 ALLEN OK
2005-07-20 580-245-5XXX 5000–5999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 IDABEL OK
2005-07-19 580-364-5XXX 5000–5999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 ATOKA OK
2005-07-19 580-743-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 HUGO OK
2005-06-29 580-668-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 WILSON OK
2005-05-23 580-235-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 ADA OK
2005-03-07 580-362-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 NEWKIRK OK
2005-03-07 580-628-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 TONKAWA OK
2004-12-07 580-572-4XXX 4000–4999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 PERRY OK
2004-12-07 580-669-5XXX 5000–5999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 GLENCOE OK
2004-12-07 580-724-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 MORRISON OK
2004-11-29 580-262-2XXX 2000–2999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 BLACKWELL OK
2004-11-29 580-718-6XXX 6000–6999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 PONCA CITY OK
2004-11-29 580-723-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 RED ROCK OK
2004-02-09 580-587-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 RATTAN OK
2004-02-09 580-896-2XXX 2000–2999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 COALGATE OK
2004-02-02 580-298-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 ANTLERS OK
2004-02-02 580-367-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 CADDO OK
2004-02-02 580-566-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 BOSWELL OK
2004-02-02 580-845-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 TUPELO OK
2004-02-02 580-847-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 BENNINGTON OK
2004-02-02 580-873-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 FORTTOWSON OK
2004-02-02 580-937-8XXX 8000–8999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 WAPANUCKA OK
2004-01-29 580-806-2XXX 2000–2999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 KINGSTON OK
2003-11-28 580-230-2XXX 2000–2999Assigned CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 DURANT OK

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.