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
2006-05-25 301-832-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN4 MD
2006-05-24 301-389-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSNG236Z13 MD
2006-05-19 301-637-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNGTNZN10 MD
2006-05-19 301-915-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-05-19 301-915-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-05-19 301-915-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-05-19 301-915-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-05-12 301-263-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-05-12 301-542-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2006-05-12 301-542-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2006-05-10 301-547-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN2 MD
2006-05-08 301-273-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN3 MD
2006-05-02 301-260-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 ASHTON236 MD
2006-05-02 301-288-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSNGTNZN12 MD
2006-04-24 301-703-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 MOUNT AIRY MD
2006-04-24 301-974-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LAUREL236 MD
2006-04-18 301-302-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2006-04-18 301-799-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2006-04-18 301-824-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SMITHSBURG MD
2006-04-18 301-857-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CLEAR SPG MD
2006-04-14 301-974-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J LAUREL236 MD
2006-04-12 301-886-3XXX 3000–3999Assigned BALTIMORE-WASHINGTON TELEPHONE (BWT) 8697 WSNG236Z13 MD
2006-04-11 301-803-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-04-07 301-407-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GAITHERSBG MD
2006-04-07 301-407-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GAITHERSBG MD
2006-04-06 301-542-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2006-04-06 301-712-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2006-04-06 301-712-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2006-04-06 301-712-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2006-04-06 301-712-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2006-04-06 301-875-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-04-06 301-875-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-04-06 301-875-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-04-06 301-875-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-04-06 301-875-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-03-30 301-850-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z14 MD
2006-03-22 301-302-3XXX 3000–3999Assigned METROPCS, INC. 5562 HAGERSTOWN MD
2006-03-22 301-302-4XXX 4000–4999Assigned METROPCS, INC. 5562 HAGERSTOWN MD
2006-03-13 301-637-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNGTNZN10 MD
2006-03-13 301-637-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNGTNZN10 MD
2006-03-13 301-828-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-03-07 301-302-2XXX 2000–2999Assigned METROPCS, INC. 5562 HAGERSTOWN MD
2006-03-06 301-448-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN3 MD
2006-03-02 301-740-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 GAITHERSBG MD
2006-03-02 301-740-8XXX 8000–8999Assigned VERIZON MARYLAND, INC. 9212 GAITHERSBG MD
2006-03-02 301-740-9XXX 9000–9999Assigned VERIZON MARYLAND, INC. 9212 GAITHERSBG MD
2006-02-21 301-263-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-02-21 301-861-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALDORF MD
2006-02-14 301-302-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 HAGERSTOWN MD
2006-02-14 301-723-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 CUMBERLAND 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.