NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 301
ONVOY, 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
2013-07-02 301-388-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNGTNZN12 MD
2013-07-02 301-640-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-07-02 301-679-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN12 MD
2013-07-02 301-732-2XXX 2000–2999Assigned METROPCS, INC. 5562 FREDERICK MD
2013-07-02 301-825-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-07-02 301-979-3XXX 3000–3999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-06-28 301-363-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F DAMASCS240 MD
2013-06-26 301-979-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2013-06-25 301-337-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J GAITHERSBG MD
2013-06-06 301-909-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD
2013-05-23 301-212-0XXX 0000–0999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-05-23 301-541-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSHNGTNZN5 MD
2013-05-23 301-541-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSHNGTNZN5 MD
2013-05-23 301-679-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSNGTNZN12 MD
2013-05-23 301-975-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-05-21 301-364-2XXX 2000–2999Assigned METROPCS, INC. 5562 WSHNGTNZN4 MD
2013-05-21 301-364-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSHNGTNZN4 MD
2013-05-21 301-583-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSHNGTNZN4 MD
2013-05-21 301-732-1XXX 1000–1999Assigned METROPCS, INC. 5562 FREDERICK MD
2013-05-20 301-278-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN5 MD
2013-05-15 301-703-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 MOUNT AIRY MD
2013-04-25 301-750-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRIENDSVL MD
2013-04-25 301-786-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MCCOOLE MD
2013-04-23 301-640-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2013-04-23 301-640-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2013-04-18 301-378-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2013-04-18 301-456-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD
2013-04-09 301-494-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z15 MD
2013-04-09 301-494-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z15 MD
2013-04-04 301-298-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z15 MD
2013-04-04 301-298-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z15 MD
2013-04-04 301-329-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON238 MD
2013-04-04 301-329-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON238 MD
2013-04-04 301-349-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G POOLESVL MD
2013-04-04 301-364-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN4 MD
2013-04-04 301-383-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z14 MD
2013-04-04 301-383-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z14 MD
2013-04-04 301-618-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN4 MD
2013-04-04 301-679-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN12 MD
2013-04-04 301-690-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LEONARDTN MD
2013-04-04 301-690-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LEONARDTN MD
2013-04-04 301-691-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G POOLESVL MD
2013-04-04 301-708-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LAUREL238 MD
2013-04-04 301-708-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LAUREL238 MD
2013-04-04 301-720-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRANDYWINE MD
2013-04-04 301-720-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRANDYWINE MD
2013-04-04 301-804-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON236 MD
2013-04-04 301-804-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON236 MD
2013-04-04 301-880-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LXTNPKGRML MD
2013-04-04 301-917-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN10 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.