NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 903
LEVEL 3 COMMUNICATIONS, LLC - TX 179
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
2026-02-19 903-867-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MT VERNON TX
2024-08-27 903-653-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LONGVIEW TX
2023-06-07 903-214-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHERMAN TX
2023-06-07 903-214-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHERMAN TX
2023-06-07 903-214-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHERMAN TX
2023-06-07 903-214-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHERMAN TX
2023-06-07 903-214-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHERMAN TX
2023-01-27 903-205-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DAINGERFLD TX
2023-01-25 903-801-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PINE ACRES TX
2023-01-25 903-916-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ORE CITY TX
2022-10-03 903-992-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CHANDLER TX
2020-10-22 903-309-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LONGVIEW TX
2019-02-11 903-282-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KERENS TX
2019-02-11 903-432-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TLSVNPONTS TX
2018-02-13 903-859-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARP TX
2017-08-11 903-492-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 QUITMAN TX
2017-02-22 903-523-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GORDONVL TX
2017-02-22 903-961-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ECTOR TX
2016-09-26 903-895-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NEW LONDON TX
2016-06-02 903-405-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TYLER TX
2015-11-30 903-398-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HONEYGROVE TX
2015-08-13 903-405-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TYLER TX
2015-07-20 903-726-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NEWSMMRFLD TX
2015-06-29 903-405-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TYLER TX
2015-05-28 903-668-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HALLSVILLE TX
2015-03-13 903-405-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TYLER TX
2014-06-16 903-319-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOOKS TX
2014-06-10 903-320-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LONE STAR TX
2014-05-20 903-585-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MAUD TX
2014-05-08 903-314-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NEW BOSTON TX
2014-05-08 903-419-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 POTTSBORO TX
2014-04-30 903-338-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KOON KREEK TX
2014-04-30 903-928-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TENESSCLNY TX
2014-04-25 903-686-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LONGVIEW TX
2014-04-22 903-400-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NECHES TX
2014-04-22 903-425-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EUSTACE TX
2014-04-22 903-451-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PAYNE SPG TX
2014-04-22 903-499-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CAYUGA TX
2014-04-22 903-978-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LKPALSTINE TX
2014-04-22 903-999-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MARTINS ML TX
2014-04-21 903-437-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BROWNSBORO TX
2014-04-18 903-226-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 QUINLAN TX
2014-04-15 903-300-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 COOPER TX
2013-11-06 903-525-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TYLER TX
2013-10-03 903-355-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GREENVILLE TX
2013-06-27 903-347-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WINNSBORO TX
2013-06-14 903-655-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HENDERSON TX
2012-10-19 903-339-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 JACKSONVL TX
2012-10-12 903-328-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHERMAN TX
2012-08-13 903-905-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PARIS TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.