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
2013-04-04 443-892-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G NEWWINDSOR MD
2013-04-04 443-941-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ELKTON MD
2013-04-04 443-964-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G NORTHBEACH MD
2013-04-04 443-964-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G NORTHBEACH MD
2013-04-04 443-966-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G FALLSTON MD
2013-04-04 443-966-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G FALLSTON MD
2013-04-04 443-967-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G NORTH EAST MD
2013-04-04 443-967-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G NORTH EAST MD
2013-04-04 443-973-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ELLICOTTCY MD
2013-04-04 443-973-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ELLICOTTCY MD
2013-04-04 443-993-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ELKTON MD
2013-03-29 443-544-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PIKESVILLE MD
2013-03-25 443-219-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2013-03-25 443-219-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2013-03-25 443-274-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SEVERN MD
2013-03-25 443-274-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SEVERN MD
2013-02-25 443-210-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SALISBURY MD
2013-02-21 443-856-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 OCEAN CITY MD
2013-02-18 443-214-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS MD
2013-02-18 443-873-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2013-02-07 443-805-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J GLENBURNIE MD
2013-01-22 443-508-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HAMPSTEAD MD
2013-01-17 443-917-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J COLUMBIA MD
2013-01-14 443-403-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2013-01-07 443-503-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DUNDALK MD
2012-12-26 443-275-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 TOWSON MD
2012-12-20 443-713-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 GLENBURNIE MD
2012-12-13 443-886-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COCKEYSVL MD
2012-12-13 443-886-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COCKEYSVL MD
2012-12-13 443-886-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COCKEYSVL MD
2012-12-06 443-990-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2012-12-04 443-720-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ABERDEEN MD
2012-11-29 443-267-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 DARLINGTON MD
2012-11-29 443-720-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ABERDEEN MD
2012-11-29 443-720-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ABERDEEN MD
2012-11-21 443-249-5XXX 5000–5999Assigned IDT AMERICA, CORP. - MD 228C STEVENSVL MD
2012-11-20 443-930-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2012-11-13 443-855-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ABERDEEN MD
2012-11-09 443-948-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2012-11-07 443-620-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WATERLO238 MD
2012-10-26 443-289-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WESTMINSTR MD
2012-10-26 443-422-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F GLENBURNIE MD
2012-10-26 443-990-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2012-10-23 443-991-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2012-09-25 443-713-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G GLENBURNIE MD
2012-09-25 443-713-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G GLENBURNIE MD
2012-09-25 443-713-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G GLENBURNIE MD
2012-09-25 443-886-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COCKEYSVL MD
2012-09-25 443-886-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COCKEYSVL MD
2012-09-25 443-906-4XXX 4000–4999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SEVERNA PK 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.