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
2011-08-18 410-622-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-08-18 410-622-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-08-18 410-622-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-08-18 410-622-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-08-18 410-622-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-08-17 410-390-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OCEAN CITY MD
2011-08-16 410-776-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2011-08-16 410-776-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2011-08-16 410-776-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2011-08-16 410-776-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2011-08-16 410-776-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2011-08-16 410-946-7XXX 7000–7999Assigned METROPCS, INC. 5562 SEVERNA PK MD
2011-08-15 410-387-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J BALTIMORE MD
2011-08-15 410-387-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BALTIMORE MD
2011-08-15 410-622-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 BALTIMORE MD
2011-08-11 410-927-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ODENTON MD
2011-08-09 410-269-3XXX 3000–3999Assigned METROPCS, INC. 5562 SEVERNA PK MD
2011-08-09 410-269-9XXX 9000–9999Assigned METROPCS, INC. 5562 SEVERNA PK MD
2011-08-09 410-777-0XXX 0000–0999Assigned METROPCS, INC. 5562 SEVERNA PK MD
2011-08-09 410-777-3XXX 3000–3999Assigned METROPCS, INC. 5562 SEVERNA PK MD
2011-08-09 410-777-6XXX 6000–6999Assigned METROPCS, INC. 5562 SEVERNA PK MD
2011-08-09 410-793-2XXX 2000–2999Assigned METROPCS, INC. 5562 SEVERNA PK MD
2011-08-09 410-793-6XXX 6000–6999Assigned METROPCS, INC. 5562 SEVERNA PK MD
2011-08-09 410-793-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 SEVERNA PK MD
2011-08-09 410-858-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ANNAPOLIS MD
2011-08-09 410-919-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ANNAPOLIS MD
2011-07-27 410-972-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2011-07-27 410-972-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2011-07-27 410-972-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2011-07-27 410-972-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2011-07-27 410-972-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2011-07-22 410-921-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SEVERN MD
2011-07-19 410-635-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NEWWINDSOR MD
2011-07-19 410-635-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NEWWINDSOR MD
2011-07-19 410-989-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2011-07-19 410-989-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2011-07-11 410-449-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 SOLOMONS MD
2011-07-05 410-803-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2011-07-05 410-803-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2011-06-14 410-346-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 SILVER RUN MD
2011-06-08 410-671-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EDGEWOOD MD
2011-06-07 410-208-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BERLIN MD
2011-06-07 410-260-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SEVERNA PK MD
2011-06-07 410-994-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F EDGEWOOD MD
2011-05-17 410-994-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F EDGEWOOD MD
2011-04-20 410-449-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SOLOMONS MD
2011-04-20 410-657-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2011-04-20 410-657-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2011-03-10 410-472-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 SPARKSGLNC MD
2011-03-07 410-390-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E OCEAN CITY 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.