NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2004-10-07 301-703-4XXX 4000–4999Assigned VERIZON MARYLAND, INC. 9212 MOUNT AIRY MD
2004-10-06 301-302-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2004-10-01 301-875-0XXX 0000–0999Assigned BALTIMORE-WASHINGTON TELEPHONE (BWT) 8697 LAUREL236 MD
2004-09-16 301-685-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J DAMASCS236 MD
2004-09-08 301-366-5XXX 5000–5999Assigned METROPCS, INC. 5562 GAITHERSBG MD
2004-09-08 301-712-0XXX 0000–0999Assigned METROPCS, INC. 5562 FREDERICK MD
2004-09-08 301-712-1XXX 1000–1999Assigned METROPCS, INC. 5562 FREDERICK MD
2004-08-18 301-418-8XXX 8000–8999Assigned METROPCS, INC. 5562 FREDERICK MD
2004-08-18 301-810-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 BUCKEYSTN MD
2004-08-11 301-876-5XXX 5000–5999Assigned USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 4720 CUMBERLAND MD
2004-08-11 301-876-7XXX 7000–7999Assigned USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 4720 CUMBERLAND MD
2004-08-11 301-876-8XXX 8000–8999Assigned USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 4720 CUMBERLAND MD
2004-08-09 301-326-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-08-09 301-768-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-08-05 301-395-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-08-05 301-395-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-08-05 301-395-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-08-05 301-395-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-07-30 301-712-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2004-07-29 301-760-5XXX 5000–5999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2004-07-19 301-768-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-07-15 301-768-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-07-06 301-418-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2004-06-10 301-238-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN16 MD
2004-06-10 301-760-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2004-05-28 301-768-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-05-28 301-768-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-05-12 301-418-5XXX 5000–5999Assigned METROPCS, INC. 5562 FREDERICK MD
2004-04-28 301-326-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-04-28 301-859-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 OAKLAND MD
2004-04-22 301-740-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 GAITHERSBG MD
2004-04-22 301-740-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 GAITHERSBG MD
2004-04-22 301-740-3XXX 3000–3999Assigned VERIZON MARYLAND, INC. 9212 GAITHERSBG MD
2004-04-21 301-326-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2004-04-20 301-444-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2004-03-26 301-418-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FREDERICK MD
2004-03-23 301-660-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KEEDYSVL MD
2004-03-19 301-750-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 FRIENDSVL MD
2004-03-19 301-799-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 KEEDYSVL MD
2004-03-19 301-882-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NEW MARKET MD
2004-03-15 301-395-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-03-10 301-331-8XXX 8000–8999Assigned METROPCS, INC. 5562 HAGERSTOWN MD
2004-02-27 301-223-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WILLIAMSPT MD
2004-02-27 301-245-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BITTINGER MD
2004-02-27 301-264-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MT SAVAGE MD
2004-02-27 301-271-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 THURMONT MD
2004-02-27 301-359-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WESTERNPT MD
2004-02-27 301-371-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MIDDLETOWN MD
2004-02-27 301-392-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J LA PLATA MD
2004-02-27 301-416-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MYERSVILLE MD

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.