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 717
LEVEL 3 COMMUNICATIONS, LLC - PA 255
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
2024-11-13 717-478-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WRIGHTSVL PA
2023-08-15 717-666-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LANCASTER PA
2023-02-17 717-528-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 YORK SPG PA
2021-01-26 717-539-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MCALISTRVL PA
2021-01-26 717-935-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BELLEVILLE PA
2020-11-06 717-694-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 RICHFIELD PA
2020-03-24 717-807-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LITITZ PA
2020-01-22 717-981-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2020-01-22 717-981-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2019-07-26 717-815-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 YORK PA
2019-05-29 717-452-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MERCERSBG PA
2019-05-29 717-895-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 GREENCASTL PA
2019-04-15 717-908-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2018-09-05 717-937-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 SCHAEFESTN PA
2018-09-05 717-970-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MYERSTOWN PA
2018-04-25 717-568-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LITITZ PA
2018-02-07 717-320-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MIFFLINTN PA
2018-02-02 717-345-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LITTLESTN PA
2017-08-09 717-952-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MILLERSBG PA
2017-04-25 717-296-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BLRDGSUMMT PA
2017-02-24 717-966-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWVILLE PA
2016-05-10 717-714-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 YORK PA
2016-04-26 717-857-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2016-03-25 717-716-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MOUNTVILLE PA
2016-03-02 717-775-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2015-12-29 717-466-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 EPHRATA PA
2015-12-28 717-954-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LEBANON PA
2015-10-07 717-301-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWBURG PA
2015-09-30 717-325-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MCONELLSBG PA
2015-09-28 717-351-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWHOLLAND PA
2015-09-28 717-488-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 TERRE HILL PA
2015-09-28 717-661-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LEOLA PA
2015-09-28 717-929-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 INTERCOURS PA
2015-08-31 717-997-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ADAMSTOWN PA
2015-07-28 717-775-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2015-06-08 717-904-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DUNCANNON PA
2015-05-28 717-212-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LEWISBERRY PA
2015-05-27 717-204-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWPORT PA
2015-05-27 717-594-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWBLOMFLD PA
2015-05-27 717-879-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MANHEIM PA
2015-05-27 717-928-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MOUNT JOY PA
2015-05-26 717-335-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DENVER PA

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.