NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 301
ONVOY, LLC - MD 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
2004-02-27 301-453-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 KITZMILLER MD
2004-02-27 301-463-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 LONACONING MD
2004-02-27 301-542-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WALDORF MD
2004-02-27 301-689-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 FROSTBURG MD
2004-02-27 301-824-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SMITHSBURG MD
2004-02-27 301-834-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BRUNSWICK MD
2004-02-27 301-836-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN5 MD
2004-02-27 301-845-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WALKERSVL MD
2004-02-27 301-850-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J WSNG236Z14 MD
2004-02-27 301-915-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN2 MD
2004-02-27 301-994-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J LXTNPKGRML MD
2004-02-27 301-997-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J LEONARDTN MD
2004-02-26 301-235-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNGTNZN16 MD
2004-02-26 301-244-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN3 MD
2004-02-26 301-246-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NANJEMOY MD
2004-02-26 301-274-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J HUGHESVL MD
2004-02-26 301-278-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN5 MD
2004-02-26 301-281-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN6 MD
2004-02-26 301-281-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN6 MD
2004-02-26 301-287-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WSNGTNZN11 MD
2004-02-26 301-288-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNGTNZN12 MD
2004-02-26 301-290-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J MECHANCSVL MD
2004-02-26 301-290-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MECHANCSVL MD
2004-02-26 301-298-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z15 MD
2004-02-26 301-375-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 INDIANHEAD MD
2004-02-26 301-478-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 FLINTSTONE MD
2004-02-26 301-575-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 LAUREL236 MD
2004-02-26 301-691-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 POOLESVL MD
2004-02-26 301-761-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNGTNZN11 MD
2004-02-26 301-810-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BUCKEYSTN MD
2004-02-26 301-833-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2004-02-26 301-886-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2004-02-26 301-978-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNGTNZN10 MD
2004-02-25 301-232-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ASHTON236 MD
2004-02-25 301-242-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BRANDYWINE MD
2004-02-25 301-539-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 LA PLATA MD
2004-02-24 301-260-6XXX 6000–6999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 ASHTON236 MD
2004-02-24 301-263-8XXX 8000–8999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 WSHNGTNZN2 MD
2004-02-24 301-556-5XXX 5000–5999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 GAITHERSBG MD
2004-02-24 301-605-8XXX 8000–8999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 WSNGTNZN10 MD
2004-02-24 301-823-8XXX 8000–8999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 WSNG236Z13 MD
2004-02-24 301-885-5XXX 5000–5999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 WALDORF MD
2004-02-24 301-971-1XXX 1000–1999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 WSHNGTNZN6 MD
2004-02-13 301-356-9XXX 9000–9999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 LAUREL236 MD
2004-02-10 301-920-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN3 MD
2004-02-05 301-326-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-02-05 301-556-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GAITHERSBG MD
2004-02-05 301-556-7XXX 7000–7999Assigned METROPCS, INC. 5562 GAITHERSBG MD
2004-01-23 301-687-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D FROSTBURG MD
2004-01-15 301-691-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J POOLESVL MD

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.