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 267
LEVEL 3 COMMUNICATIONS, LLC - PA 195
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
2021-06-09 267-946-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2021-04-15 267-946-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2021-03-17 267-946-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2020-05-27 267-807-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2020-04-21 267-996-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2020-03-30 267-876-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2019-12-12 267-846-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2019-10-08 267-846-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2019-08-22 267-857-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2019-08-22 267-857-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2019-01-09 267-322-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2018-07-09 267-768-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2018-05-01 267-985-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2018-05-01 267-985-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 QUAKERTOWN PA
2016-04-26 267-940-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2015-07-08 267-705-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN33 PA
2014-10-07 267-787-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2014-09-29 267-356-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DOYLESTOWN PA
2014-09-11 267-578-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DUBLIN PA
2014-09-11 267-578-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DUBLIN PA
2014-09-10 267-686-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN4 PA
2014-09-10 267-774-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN3 PA
2014-07-25 267-262-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2014-06-10 267-758-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2014-05-28 267-314-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2014-04-18 267-314-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2014-03-26 267-262-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2014-02-07 267-406-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DOYLESTOWN PA
2014-02-06 267-705-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN33 PA
2014-02-06 267-774-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN3 PA
2014-01-20 267-329-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 GREEN LANE PA
2014-01-20 267-828-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BEDMINSTER PA
2013-09-30 267-359-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA
2013-09-30 267-359-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN2 PA

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.