NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

13 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 724
ONVOY, LLC - PA 10
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2
NEW CINGULAR WIRELESS PCS, LLC - IL 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
2018-05-23 724-481-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NIXON PA
2018-05-23 724-481-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NIXON PA
2018-05-23 724-481-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NIXON PA
2018-05-23 724-521-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PARIS PA
2018-05-23 724-521-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PARIS PA
2018-05-23 724-521-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PARIS PA
2018-05-23 724-534-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MURDOCKSVL PA
2018-05-23 724-534-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MURDOCKSVL PA
2018-05-23 724-534-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MURDOCKSVL PA
2018-05-23 724-536-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWFLORNCE PA
2018-05-23 724-536-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWFLORNCE PA
2018-05-23 724-536-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWFLORNCE PA
2018-05-23 724-542-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MTPLEASANT PA
2018-05-23 724-542-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MTPLEASANT PA
2018-05-23 724-556-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SLIPPERYRK PA
2018-05-23 724-556-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SLIPPERYRK PA
2018-05-23 724-556-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SLIPPERYRK PA
2018-05-23 724-563-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 STAHLSTOWN PA
2018-05-23 724-563-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 STAHLSTOWN PA
2018-05-23 724-563-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 STAHLSTOWN PA
2018-05-23 724-577-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MARION PA
2018-05-23 724-577-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MARION PA
2018-05-23 724-577-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PT MARION PA
2018-05-23 724-585-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PORTERSVL PA
2018-05-23 724-585-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PORTERSVL PA
2018-05-23 724-585-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PORTERSVL PA
2018-05-23 724-590-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PTGSBNZN23 PA
2018-05-23 724-606-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NOWASHIGTN PA
2018-05-23 724-606-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NOWASHIGTN PA
2018-05-23 724-606-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NOWASHIGTN PA
2018-05-23 724-660-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIDLAND PA
2018-05-23 724-660-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIDLAND PA
2018-05-23 724-660-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIDLAND PA
2018-05-23 724-764-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SMITHSFRRY PA
2018-05-23 724-764-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SMITHSFRRY PA
2018-05-23 724-848-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MERIDIAN PA
2018-05-23 724-848-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MERIDIAN PA
2018-05-23 724-848-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MERIDIAN PA
2018-05-23 724-928-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 OAKDALE PA
2018-05-23 724-928-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 OAKDALE PA
2018-05-23 724-997-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MONONGAHLA PA
2018-05-23 724-997-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MONONGAHLA PA
2018-05-22 724-257-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TARENTUM PA
2018-05-22 724-257-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TARENTUM PA
2018-05-22 724-257-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TARENTUM PA
2018-05-22 724-303-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LOWELLVL PA
2018-05-22 724-303-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LOWELLVL PA
2018-05-22 724-303-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LOWELLVL PA
2018-05-22 724-358-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 GREENSBORO PA
2018-05-22 724-358-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 GREENSBORO 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.