NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

8 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 570
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7
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
2018-10-16 570-475-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MOUNTANTOP PA
2018-10-16 570-475-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MOUNTANTOP PA
2018-10-16 570-518-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIFFLINBG PA
2018-10-16 570-518-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIFFLINBG PA
2018-10-16 570-518-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIFFLINBG PA
2018-10-16 570-518-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIFFLINBG PA
2018-10-16 570-726-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MILL HALL PA
2018-10-16 570-733-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NANTICOKE PA
2018-10-16 570-749-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MILL HALL PA
2018-10-16 570-749-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MILL HALL PA
2018-10-16 570-757-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY PA
2018-10-16 570-757-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY PA
2018-10-16 570-757-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY PA
2018-10-16 570-757-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY PA
2018-10-16 570-757-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY PA
2018-10-16 570-757-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY PA
2018-10-16 570-757-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY PA
2018-10-15 570-248-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAWRENCEVL PA
2018-10-15 570-248-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAWRENCEVL PA
2018-10-15 570-248-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAWRENCEVL PA
2018-10-15 570-248-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAWRENCEVL PA
2018-10-15 570-446-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PITTSTON PA
2018-10-15 570-771-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PLYMOUTH PA
2018-10-12 570-375-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAKEWOOD PA
2018-10-12 570-375-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAKEWOOD PA
2018-10-12 570-375-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAKEWOOD PA
2018-10-12 570-805-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANSFORD PA
2018-10-12 570-805-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANSFORD PA
2018-10-12 570-805-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANSFORD PA
2018-10-12 570-805-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANSFORD PA
2018-10-12 570-805-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANSFORD PA
2018-10-11 570-306-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COVINGTON PA
2018-10-11 570-306-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COVINGTON PA
2018-10-11 570-306-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COVINGTON PA
2018-10-11 570-306-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COVINGTON PA
2018-10-11 570-306-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COVINGTON PA
2018-10-11 570-306-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COVINGTON PA
2018-10-11 570-310-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 DALLAS PA
2018-10-11 570-310-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 DALLAS PA
2018-10-11 570-349-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EAGLESMERE PA
2018-10-11 570-349-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EAGLESMERE PA
2018-10-11 570-349-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EAGLESMERE PA
2018-10-11 570-349-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EAGLESMERE PA
2018-10-11 570-999-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 FORESTCITY PA
2018-10-10 570-551-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEWISBURG PA
2018-10-09 570-623-1XXX 1000–1999Assigned ONVOY, LLC - PA 547E LITTLE MDW PA
2018-10-09 570-663-6XXX 6000–6999Assigned ONVOY, LLC - PA 547E QUAKERLAKE PA
2018-10-01 570-914-0XXX 0000–0999Assigned NUSO, LLC 551G SCRANTON PA
2018-10-01 570-914-2XXX 2000–2999Assigned NUSO, LLC 551G SCRANTON PA
2018-09-24 570-405-6XXX 6000–6999Assigned TELNYX LLC 073H ASHLAND 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.