NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 410
ONVOY, LLC - MD 2
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
2004-03-04 410-629-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BERLIN MD
2004-03-04 410-645-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WOODLAWN MD
2004-03-04 410-648-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GALENA MD
2004-03-04 410-702-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 REISTERSTN MD
2004-03-04 410-709-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SPARROWSPT MD
2004-03-04 410-741-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WEST RIVER MD
2004-03-04 410-754-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 FEDERALSBG MD
2004-03-04 410-784-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DEALISLAND MD
2004-03-04 410-873-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NANTICOKE MD
2004-03-04 410-881-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SHERWD FOR MD
2004-03-04 410-883-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SHARPTOWN MD
2004-03-04 410-885-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHESAPKECY MD
2004-03-04 410-896-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DELMAR MD
2004-03-04 410-904-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WATERLO238 MD
2004-03-04 410-928-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MILLINGTON MD
2004-03-04 410-943-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 HURLOCK MD
2004-03-04 410-968-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CRISFIELD MD
2004-03-01 410-317-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ARGRGBSNIS MD
2004-03-01 410-401-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BRYNPKLNCM MD
2004-03-01 410-406-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ESSEX MD
2004-03-01 410-457-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DARLINGTON MD
2004-03-01 410-482-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GREENSBORO MD
2004-03-01 410-505-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELLICOTTCY MD
2004-03-01 410-510-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 FORK MD
2004-03-01 410-567-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKRIDGE MD
2004-03-01 410-630-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHASE MD
2004-03-01 410-670-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 EDGEWOOD MD
2004-03-01 410-692-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 JARRETTSVL MD
2004-03-01 410-697-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MILLERSVL MD
2004-03-01 410-762-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GLENBURNIE MD
2004-03-01 410-942-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 HAVREGRACE MD
2004-02-27 410-314-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ARBUTUS MD
2004-02-27 410-406-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J ESSEX MD
2004-02-27 410-414-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J PRINCEFRCK MD
2004-02-27 410-505-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J ELLICOTTCY MD
2004-02-27 410-513-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J PARKVILLE MD
2004-02-27 410-875-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J SYKESVILLE MD
2004-02-27 410-942-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J HAVREGRACE MD
2004-02-10 410-349-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2004-02-10 410-919-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2004-02-10 410-919-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2004-02-10 410-919-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2004-02-10 410-972-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2004-02-04 410-690-1XXX 1000–1999Assigned METROPCS, INC. 5562 EASTON MD
2004-01-27 410-713-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 SALISBURY MD
2004-01-27 410-713-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 SALISBURY MD
2004-01-23 410-319-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J BALTIMORE MD
2004-01-23 410-701-1XXX 1000–1999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 RANDALLSTN MD
2004-01-21 410-317-1XXX 1000–1999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 ARGRGBSNIS MD
2004-01-21 410-401-3XXX 3000–3999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 BRYNPKLNCM 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.