NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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, last 30 days — NPA 814
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 6
ONVOY, LLC - PA 1
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
2018-10-16 814-551-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PENFIELD PA
2018-10-16 814-551-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PENFIELD PA
2018-10-16 814-551-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PENFIELD PA
2018-10-16 814-551-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PENFIELD PA
2018-10-16 814-551-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PENFIELD PA
2018-10-16 814-551-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PENFIELD PA
2018-10-16 814-605-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MCONELLSTN PA
2018-10-16 814-605-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MCONELLSTN PA
2018-10-16 814-605-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MCONELLSTN PA
2018-10-16 814-605-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MCONELLSTN PA
2018-10-16 814-627-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MCONELLSTN PA
2018-10-16 814-829-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MARKLESBG PA
2018-10-16 814-829-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MARKLESBG PA
2018-10-16 814-829-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MARKLESBG PA
2018-10-16 814-829-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MARKLESBG PA
2018-10-16 814-829-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MARKLESBG PA
2018-10-15 814-912-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LINESVILLE PA
2018-10-15 814-912-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LINESVILLE PA
2018-10-15 814-912-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LINESVILLE PA
2018-10-15 814-912-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LINESVILLE PA
2018-10-15 814-912-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LINESVILLE PA
2018-10-15 814-912-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LINESVILLE PA
2018-10-12 814-294-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KERSEY PA
2018-10-12 814-294-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KERSEY PA
2018-10-12 814-294-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KERSEY PA
2018-10-12 814-294-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KERSEY PA
2018-10-12 814-294-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KERSEY PA
2018-10-12 814-294-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KERSEY PA
2018-10-12 814-625-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HOWARD PA
2018-10-12 814-625-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HOWARD PA
2018-10-12 814-630-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MATILDA PA
2018-10-12 814-630-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MATILDA PA
2018-10-12 814-630-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MATILDA PA
2018-10-12 814-630-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MATILDA PA
2018-10-12 814-630-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MATILDA PA
2018-10-12 814-630-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MATILDA PA
2018-10-12 814-630-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MATILDA PA
2018-10-11 814-252-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTLK PA
2018-10-11 814-252-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTLK PA
2018-10-11 814-252-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTLK PA
2018-10-11 814-252-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTLK PA
2018-10-11 814-252-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTLK PA
2018-10-11 814-252-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTLK PA
2018-10-11 814-252-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTLK PA
2018-10-11 814-307-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROCKWAY PA
2018-10-11 814-307-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROCKWAY PA
2018-10-11 814-307-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROCKWAY PA
2018-10-11 814-307-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROCKWAY PA
2018-10-11 814-307-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROCKWAY PA
2018-10-11 814-307-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROCKWAY 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.