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
2008-01-22 443-759-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2008-01-22 443-759-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2008-01-22 443-837-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ANNAPOLIS MD
2008-01-15 443-292-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 CROFTON MD
2008-01-14 443-360-6XXX 6000–6999Assigned VERIZON MARYLAND, INC. 9212 ABERDEEN MD
2008-01-11 443-359-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 DELMAR MD
2008-01-11 443-566-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 CHESAPKECY MD
2008-01-11 443-669-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 DELMAR MD
2008-01-11 443-758-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 ANNAPOLIS MD
2008-01-08 443-559-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ESSEX MD
2008-01-08 443-675-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 RANDALLSTN MD
2008-01-08 443-813-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2008-01-08 443-813-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2008-01-08 443-813-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2008-01-08 443-813-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2008-01-08 443-813-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2008-01-08 443-813-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2008-01-08 443-962-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2008-01-08 443-962-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2008-01-07 443-360-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ABERDEEN MD
2007-12-27 443-477-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 CAMBRIDGE MD
2007-12-27 443-752-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BEL AIR MD
2007-12-27 443-766-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COLUMBIA MD
2007-12-27 443-962-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GLENBURNIE MD
2007-12-10 443-837-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ANNAPOLIS MD
2007-12-10 443-852-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ANNAPOLIS MD
2007-12-06 443-510-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 ANNAPOLIS MD
2007-12-06 443-934-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2007-12-04 443-550-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NORTHBEACH MD
2007-11-30 443-877-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NORTH EAST MD
2007-11-28 443-359-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 DELMAR MD
2007-11-28 443-752-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BEL AIR MD
2007-11-28 443-766-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COLUMBIA MD
2007-11-28 443-813-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2007-11-28 443-813-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2007-11-28 443-859-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2007-11-28 443-859-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2007-11-28 443-945-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 ELKTON MD
2007-11-28 443-962-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GLENBURNIE MD
2007-11-21 443-484-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EDGEWOOD MD
2007-11-20 443-225-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 CAMBRIDGE MD
2007-11-20 443-318-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 COCKEYSVL MD
2007-11-20 443-334-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 PIKESVILLE MD
2007-11-20 443-602-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2007-11-08 443-962-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 GLENBURNIE MD
2007-11-06 443-379-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PIKESVILLE MD
2007-11-06 443-875-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2007-11-06 443-875-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2007-10-30 443-759-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2007-10-26 443-938-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE 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.