NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 570
CORE COMMUNICATIONS, INC. - PA 452
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
2019-03-13 570-627-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TOWANDA PA
2019-03-13 570-627-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TOWANDA PA
2019-03-13 570-627-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TOWANDA PA
2019-03-13 570-737-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SPRINGVL PA
2019-03-13 570-737-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SPRINGVL PA
2019-03-13 570-746-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WYALUSING PA
2019-03-12 570-237-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PITTSTON PA
2019-03-12 570-237-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PITTSTON PA
2019-03-12 570-247-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ROME PA
2019-03-12 570-247-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ROME PA
2019-03-11 570-256-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUHLENBURG PA
2019-03-11 570-667-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUHLENBURG PA
2019-03-11 570-736-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NANTICOKE PA
2019-03-11 570-736-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NANTICOKE PA
2019-03-08 570-376-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIDLEBYCTR PA
2019-03-08 570-532-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LIBERTY PA
2019-03-08 570-545-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MANSFIELD PA
2019-03-07 570-378-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAKEWINOLA PA
2019-03-07 570-732-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 JIM THORPE PA
2019-03-07 570-732-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 JIM THORPE PA
2019-03-07 570-744-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LE RAYSVL PA
2019-03-07 570-827-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAWRENCEVL PA
2019-03-07 570-967-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAWSVILLE PA
2019-03-06 570-438-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROOKLYN PA
2019-03-06 570-438-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROOKLYN PA
2019-03-05 570-962-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEECHCREEK PA
2019-02-05 570-758-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MANDATA PA
2019-02-04 570-224-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 GALILEE PA
2019-02-04 570-946-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAPORTE PA
2018-10-17 570-201-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 RUSH PA
2018-10-17 570-201-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 RUSH PA
2018-10-17 570-201-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 RUSH PA
2018-10-17 570-201-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 RUSH PA
2018-10-17 570-303-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 THOMPSON PA
2018-10-17 570-303-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 THOMPSON PA
2018-10-17 570-303-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 THOMPSON PA
2018-10-17 570-303-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 THOMPSON PA
2018-10-17 570-548-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ST JOSEPH PA
2018-10-17 570-548-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ST JOSEPH PA
2018-10-17 570-548-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ST JOSEPH PA
2018-10-17 570-548-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ST JOSEPH PA
2018-10-17 570-564-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2018-10-17 570-564-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2018-10-17 570-564-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2018-10-17 570-564-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2018-10-17 570-564-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2018-10-17 570-564-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2018-10-17 570-625-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2018-10-17 570-625-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2018-10-17 570-653-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 VALLEYVIEW PA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.