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
2014-05-07 410-983-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2014-05-02 410-344-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CHASE MD
2014-05-02 410-413-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PIKESVILLE MD
2014-04-18 410-275-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CECILTON MD
2014-04-18 410-755-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WARWICK MD
2014-02-13 410-656-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NORTH EAST MD
2014-02-07 410-589-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BRYNPKLNCM MD
2014-01-31 410-413-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PIKESVILLE MD
2014-01-22 410-834-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WATERLO236 MD
2014-01-21 410-989-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2014-01-21 410-989-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2014-01-21 410-989-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2014-01-14 410-980-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2013-12-18 410-656-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NORTH EAST MD
2013-12-11 410-928-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 MILLINGTON MD
2013-11-11 410-888-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J WATERLO236 MD
2013-10-25 410-567-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2013-09-27 410-862-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J WATERLO236 MD
2013-09-09 410-875-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SYKESVILLE MD
2013-08-30 410-657-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PARKVILLE MD
2013-08-15 410-934-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2013-08-01 410-834-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WATERLO236 MD
2013-07-15 410-220-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2013-07-02 410-314-6XXX 6000–6999Assigned METROPCS, INC. 5562 ARBUTUS MD
2013-07-02 410-314-8XXX 8000–8999Assigned METROPCS, INC. 5562 ARBUTUS MD
2013-07-02 410-565-2XXX 2000–2999Assigned METROPCS, INC. 5562 ARBUTUS MD
2013-06-25 410-390-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J OCEAN CITY MD
2013-05-30 410-648-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 GALENA MD
2013-05-21 410-220-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ELKRIDGE MD
2013-05-21 410-501-0XXX 0000–0999Assigned METROPCS, INC. 5562 ARBUTUS MD
2013-05-21 410-501-4XXX 4000–4999Assigned METROPCS, INC. 5562 ARBUTUS MD
2013-05-21 410-501-7XXX 7000–7999Assigned METROPCS, INC. 5562 ARBUTUS MD
2013-05-21 410-501-8XXX 8000–8999Assigned METROPCS, INC. 5562 ARBUTUS MD
2013-05-21 410-501-9XXX 9000–9999Assigned METROPCS, INC. 5562 ARBUTUS MD
2013-05-21 410-834-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WATERLO236 MD
2013-05-06 410-896-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DELMAR MD
2013-05-06 410-973-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BERLIN MD
2013-04-25 410-226-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OXFORD MD
2013-04-23 410-306-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2013-04-05 410-231-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SOLOMONS MD
2013-04-05 410-449-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SOLOMONS MD
2013-04-04 410-220-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ELKRIDGE MD
2013-04-04 410-220-4XXX 4000–4999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ELKRIDGE MD
2013-04-04 410-457-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G DARLINGTON MD
2013-04-04 410-862-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WATERLO236 MD
2013-04-04 410-862-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WATERLO236 MD
2013-03-13 410-604-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J STEVENSVL MD
2013-03-13 410-807-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CATONSVL MD
2013-03-13 410-807-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CATONSVL MD
2013-02-18 410-571-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS 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.