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 267
CORE COMMUNICATIONS, INC. - PA 192
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
2019-03-12 267-287-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN34 PA
2019-03-12 267-346-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN33 PA
2019-03-12 267-362-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PLUMSTEDVL PA
2019-03-12 267-362-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PLUMSTEDVL PA
2019-03-12 267-462-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN33 PA
2019-03-12 267-476-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN33 PA
2019-03-12 267-476-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN33 PA
2019-03-12 267-476-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN33 PA
2019-03-12 267-476-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN33 PA
2019-03-12 267-526-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN41 PA
2019-03-12 267-526-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN41 PA
2019-03-12 267-527-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN41 PA
2019-03-12 267-529-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN41 PA
2019-03-12 267-548-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN42 PA
2019-03-12 267-557-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN42 PA
2019-03-12 267-583-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN44 PA
2019-03-12 267-583-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN44 PA
2019-03-12 267-585-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN44 PA
2019-03-12 267-633-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN34 PA
2019-03-12 267-727-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN37 PA
2019-03-12 267-728-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN37 PA
2019-03-12 267-728-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN37 PA
2019-03-12 267-735-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN34 PA
2019-03-11 267-364-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWTOWN PA
2019-03-11 267-743-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEW HOPE PA
2019-03-11 267-747-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEW HOPE PA
2019-03-11 267-747-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEW HOPE PA
2019-03-11 267-747-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEW HOPE PA
2019-03-11 267-747-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEW HOPE PA
2019-03-11 267-832-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWTOWN PA
2019-03-06 267-843-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BUCKINGHAM PA
2019-03-06 267-843-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BUCKINGHAM PA
2019-03-06 267-843-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BUCKINGHAM PA
2019-03-05 267-823-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-03-05 267-926-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-03-05 267-926-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-03-05 267-926-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-03-05 267-926-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-03-05 267-926-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-03-05 267-926-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-03-05 267-926-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-03-05 267-926-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEDMINSTER PA
2019-02-22 267-727-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN37 PA
2018-10-17 267-493-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WYCOMBE PA
2018-10-17 267-493-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WYCOMBE PA
2018-10-17 267-493-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WYCOMBE PA
2018-10-17 267-493-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WYCOMBE PA
2018-10-17 267-494-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WYCOMBE PA
2018-10-16 267-655-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NORTHWALES PA
2018-10-16 267-655-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NORTHWALES 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.