NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 443
ONVOY, LLC - MD 8
NEW CINGULAR WIRELESS PCS, LLC - DC 4
VERSATEL LLC 1
OPENTACT INC. 1
LEVEL 3 COMMUNICATIONS, 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
2014-12-15 443-879-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D DUNDALK MD
2014-12-15 443-879-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D DUNDALK MD
2014-12-15 443-933-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D COCKEYSVL MD
2014-12-15 443-933-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D COCKEYSVL MD
2014-12-15 443-960-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D GLENBURNIE MD
2014-12-15 443-960-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D GLENBURNIE MD
2014-12-15 443-998-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D PARKVILLE MD
2014-12-15 443-998-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D PARKVILLE MD
2014-12-10 443-484-3XXX 3000–3999Assigned METROPCS, INC. 5562 EDGEWOOD MD
2014-12-10 443-484-5XXX 5000–5999Assigned METROPCS, INC. 5562 EDGEWOOD MD
2014-12-10 443-704-2XXX 2000–2999Assigned METROPCS, INC. 5562 ODENTON MD
2014-12-10 443-704-4XXX 4000–4999Assigned METROPCS, INC. 5562 ODENTON MD
2014-12-09 443-342-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SOLOMONS MD
2014-12-05 443-979-4XXX 4000–4999Assigned METROPCS, INC. 5562 COLUMBIA MD
2014-12-05 443-979-5XXX 5000–5999Assigned METROPCS, INC. 5562 COLUMBIA MD
2014-12-03 443-207-7XXX 7000–7999Assigned METROPCS, INC. 5562 ELKTON MD
2014-12-03 443-245-2XXX 2000–2999Assigned METROPCS, INC. 5562 ELKTON MD
2014-11-25 443-943-6XXX 6000–6999Assigned METROPCS, INC. 5562 SPARROWSPT MD
2014-11-13 443-251-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CATONSVL MD
2014-11-13 443-331-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J TANEYTOWN MD
2014-11-13 443-450-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PIKESVILLE MD
2014-11-13 443-554-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CHASE MD
2014-11-13 443-554-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CHASE MD
2014-11-13 443-653-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PARKVILLE MD
2014-11-13 443-653-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PARKVILLE MD
2014-11-13 443-787-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2014-11-13 443-787-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2014-11-10 443-979-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J COLUMBIA MD
2014-11-07 443-522-8XXX 8000–8999Assigned METROPCS, INC. 5562 REISTERSTN MD
2014-11-05 443-664-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J OCEAN CITY MD
2014-11-05 443-707-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 ABERDEEN MD
2014-10-29 443-979-2XXX 2000–2999Assigned METROPCS, INC. 5562 COLUMBIA MD
2014-10-27 443-775-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2014-10-27 443-787-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BEL AIR MD
2014-10-27 443-796-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PIKESVILLE MD
2014-10-14 443-548-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PIKESVILLE MD
2014-10-14 443-993-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D ELKTON MD
2014-10-14 443-993-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D ELKTON MD
2014-10-13 443-410-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2014-10-13 443-410-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2014-10-13 443-410-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2014-10-13 443-410-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2014-10-13 443-583-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 COLUMBIA MD
2014-10-13 443-649-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPARROWSPT MD
2014-10-13 443-657-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 RANDALLSTN MD
2014-10-13 443-657-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 RANDALLSTN MD
2014-10-13 443-666-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J CHESTERTN MD
2014-10-13 443-707-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2014-10-13 443-707-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2014-10-13 443-707-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN 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.