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
2009-03-13 570-261-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MOUNTANTOP PA
2009-03-13 570-277-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWPHLDLPH PA
2009-03-13 570-291-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 OLYPHANT PA
2009-03-13 570-298-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NOXEN PA
2009-03-13 570-339-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MT CARMEL PA
2009-03-13 570-355-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 POCONOLAKE PA
2009-03-13 570-365-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MTPLSANTML PA
2009-03-13 570-392-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WYOMING PA
2009-03-13 570-427-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WEATHERLY PA
2009-03-13 570-437-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WASHIGTNVL PA
2009-03-13 570-456-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MOOSIC PA
2009-03-13 570-543-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TAYLOR PA
2009-03-13 570-581-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 POTTSVILLE PA
2009-03-13 570-608-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SWEET VLY PA
2009-03-13 570-626-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TREVORTON PA
2009-03-13 570-669-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NESQUHONNG PA
2009-03-13 570-678-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NUANGOLA PA
2009-03-13 570-683-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ORANGEVL PA
2009-03-13 570-701-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NORTHUBRLD PA
2009-03-13 570-705-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 RINGTOWN PA
2009-03-13 570-737-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SPRINGVL PA
2009-03-13 570-769-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WOOLRICH PA
2009-03-13 570-771-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PLYMOUTH PA
2009-03-13 570-799-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NUMIDIA PA
2009-03-13 570-801-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SAYLORSBG PA
2009-03-13 570-843-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MOSCOW PA
2009-03-13 570-863-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SUNBURY PA
2009-03-13 570-895-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MT POCONO PA
2009-03-13 570-897-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PORTLAND PA
2009-03-13 570-901-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TRUCKSVL PA
2009-03-13 570-942-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NICHOLSON PA
2009-03-13 570-949-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ROWLAND PA
2009-03-13 570-968-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ORWIGSBURG PA
2009-03-13 570-987-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NUREMBERG PA
2009-03-12 570-221-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ELYSBURG PA
2009-03-12 570-230-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 JERMYN PA
2009-03-12 570-249-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 JIM THORPE PA
2009-03-12 570-254-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CHAPMAN LK PA
2009-03-12 570-257-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LORDS VLY PA
2009-03-12 570-276-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 GIRARDVL PA
2009-03-12 570-284-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 DANVILLE PA
2009-03-12 570-319-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CLARKSSMMT PA
2009-03-12 570-333-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CTR MORELD PA
2009-03-12 570-356-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CATAWISSA PA
2009-03-12 570-359-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CNYNGHDRMS PA
2009-03-12 570-373-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KULPMONT PA
2009-03-12 570-390-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HAWLEY PA
2009-03-12 570-425-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MANDATA PA
2009-03-12 570-431-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BUSHKILL PA
2009-03-12 570-433-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LOYALSOCK 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.