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
2004-07-20 410-300-6XXX 6000–6999Assigned METROPCS, INC. 5562 ELKRIDGE MD
2004-07-20 410-300-7XXX 7000–7999Assigned METROPCS, INC. 5562 ELKRIDGE MD
2004-07-15 410-300-8XXX 8000–8999Assigned METROPCS, INC. 5562 ELKRIDGE MD
2004-07-15 410-300-9XXX 9000–9999Assigned METROPCS, INC. 5562 ELKRIDGE MD
2004-07-07 410-200-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 EASTON MD
2004-07-02 410-725-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 EASTON MD
2004-06-22 410-698-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FORK MD
2004-06-16 410-741-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WEST RIVER MD
2004-06-10 410-595-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 GLENBURNIE MD
2004-06-04 410-713-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2004-06-04 410-713-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2004-05-18 410-690-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 EASTON MD
2004-05-18 410-928-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 MILLINGTON MD
2004-05-12 410-588-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2004-05-12 410-588-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2004-05-12 410-624-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J BALTIMORE MD
2004-05-07 410-713-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2004-05-07 410-829-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 EASTON MD
2004-05-05 410-970-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 SYKESVILLE MD
2004-04-21 410-698-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FORK MD
2004-04-21 410-698-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FORK MD
2004-03-31 410-541-3XXX 3000–3999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 SEVERNA PK MD
2004-03-29 410-609-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BRYNPKLNCM MD
2004-03-23 410-845-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 SALISBURY MD
2004-03-05 410-226-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OXFORD MD
2004-03-05 410-348-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 STILL POND MD
2004-03-05 410-376-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 VIENNA MD
2004-03-05 410-397-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WINGATE MD
2004-03-05 410-425-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SMITH IS MD
2004-03-05 410-438-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SUDLERSVL MD
2004-03-05 410-476-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 TRAPPE MD
2004-03-05 410-632-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SNOW HILL MD
2004-03-05 410-634-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RIDGELY MD
2004-03-05 410-639-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ROCK HALL MD
2004-03-05 410-673-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 PRESTON MD
2004-03-05 410-745-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 STMICHAELS MD
2004-03-05 410-755-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WARWICK MD
2004-03-05 410-827-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 QUEENSTOWN MD
2004-03-05 410-835-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WILLARDS MD
2004-03-05 410-886-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 TILGHMAN MD
2004-03-04 410-275-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CECILTON MD
2004-03-04 410-305-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ODENTON MD
2004-03-04 410-343-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SPARKSGLNC MD
2004-03-04 410-352-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BISHOPVL MD
2004-03-04 410-364-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 HILLSBORO MD
2004-03-04 410-394-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SOLOMONS MD
2004-03-04 410-479-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DENTON MD
2004-03-04 410-514-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SEVERN MD
2004-03-04 410-556-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHURCHHILL MD
2004-03-04 410-623-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MARION 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.