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 937
LEVEL 3 COMMUNICATIONS, LLC - OH 199
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2026-04-07 937-955-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GERMANTOWN OH
2024-07-02 937-569-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GREENVILLE OH
2022-09-27 937-300-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 EATON OH
2022-04-25 937-820-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HILLSBORO OH
2021-01-28 937-518-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2020-10-08 937-712-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MOUNT ORAB OH
2020-08-12 937-600-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 XENIA OH
2020-08-05 937-741-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2020-07-30 937-868-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GREENFIELD OH
2020-07-23 937-722-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BELLEFNTAN OH
2020-07-23 937-900-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BEAVERCREK OH
2020-07-23 937-926-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SPRINGFLD OH
2020-05-05 937-688-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SPRINGFLD OH
2018-08-23 937-721-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MAGNETCSPG OH
2018-03-28 937-553-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARYSVILLE OH
2018-03-26 937-249-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ABERDEEN OH
2018-03-26 937-967-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MT VICTORY OH
2017-06-30 937-965-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2017-02-01 937-977-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2016-07-19 937-991-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2015-11-24 937-993-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2015-07-28 937-949-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2015-06-17 937-949-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2015-04-23 937-949-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2015-04-02 937-715-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TROTWOOD OH
2014-10-24 937-949-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2014-05-15 937-870-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWLEBANON OH
2014-05-06 937-720-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEW PARIS OH
2014-05-06 937-770-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BROOKVILLE OH
2014-05-06 937-798-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PEEBLES OH
2014-05-05 937-273-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ELDORADO OH
2014-05-05 937-448-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BRADFORD OH
2014-05-05 937-659-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ANSONIA OH
2014-05-05 937-662-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ARCANUM OH
2014-05-05 937-841-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GETTYSBURG OH
2014-02-07 937-560-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MSBGWCRLTN OH
2014-01-17 937-358-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YORKCENTER OH
2014-01-17 937-810-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RUSSELLSPT OH
2014-01-17 937-887-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 W LIBERTY OH
2014-01-16 937-240-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BELLE CTR OH
2014-01-16 937-246-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RAYMOND OH
2014-01-16 937-349-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MILFORDCTR OH
2014-01-16 937-362-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ROSEWOOD OH
2014-01-16 937-468-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RUSHSYLVAN OH
2014-01-16 937-982-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BYHALIA OH
2013-12-26 937-262-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2013-12-10 937-742-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 VANDALIA OH
2013-10-25 937-452-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CAMDEN OH
2013-09-16 937-639-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ANNA OH
2013-09-16 937-821-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FT LORAMIE OH

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.