NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

17 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2011-02-01 443-882-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-01-31 443-294-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WEST RIVER MD
2011-01-31 443-304-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ARBUTUS MD
2011-01-31 443-351-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ODENTON MD
2011-01-31 443-360-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ABERDEEN MD
2011-01-31 443-398-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SYKESVILLE MD
2011-01-31 443-424-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CARDIFF MD
2011-01-31 443-485-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ELKTON MD
2011-01-31 443-485-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELKTON MD
2011-01-31 443-485-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ELKTON MD
2011-01-31 443-547-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WESTMINSTR MD
2011-01-31 443-574-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ELLICOTTCY MD
2011-01-31 443-579-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ESSEX MD
2011-01-31 443-837-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS MD
2011-01-25 443-872-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-01-25 443-902-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-01-25 443-902-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-01-25 443-902-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-01-25 443-902-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-01-25 443-902-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-01-19 443-595-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SPARKSGLNC MD
2011-01-13 443-440-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 ANNAPOLIS MD
2011-01-13 443-440-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 ANNAPOLIS MD
2011-01-12 443-594-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SPARROWSPT MD
2011-01-10 443-379-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J PIKESVILLE MD
2011-01-10 443-888-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J PRINCEANNE MD
2011-01-06 443-860-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 CATONSVL MD
2011-01-06 443-902-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-01-06 443-902-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-01-06 443-902-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-01-06 443-902-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-01-06 443-902-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-01-04 443-239-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 EASTON MD
2011-01-04 443-377-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2011-01-04 443-377-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2011-01-04 443-377-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2011-01-04 443-377-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2011-01-04 443-422-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GLENBURNIE MD
2011-01-04 443-422-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GLENBURNIE MD
2011-01-04 443-546-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COLUMBIA MD
2011-01-04 443-619-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BEL AIR MD

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.