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
2015-09-24 301-691-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D POOLESVL MD
2015-09-22 301-329-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D ASHTON238 MD
2015-09-16 301-417-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN10 MD
2015-09-03 301-747-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN6 MD
2015-08-31 301-703-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MOUNT AIRY MD
2015-08-21 301-235-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN16 MD
2015-08-20 301-278-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN5 MD
2015-08-20 301-316-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN5 MD
2015-08-19 301-812-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSNG238Z15 MD
2015-08-18 301-417-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSNGTNZN10 MD
2015-08-18 301-477-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z13 MD
2015-08-07 301-458-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2015-08-07 301-846-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2015-08-06 301-485-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN6 MD
2015-07-30 301-433-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD
2015-07-13 301-245-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BITTINGER MD
2015-07-13 301-453-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KITZMILLER MD
2015-07-13 301-750-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FRIENDSVL MD
2015-07-09 301-732-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2015-06-26 301-327-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D WSNG238Z15 MD
2015-06-26 301-900-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2015-06-26 301-900-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2015-06-26 301-900-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2015-06-26 301-900-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2015-06-26 301-900-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2015-06-26 301-900-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2015-06-26 301-900-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2015-06-23 301-265-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN6 MD
2015-06-23 301-732-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2015-06-23 301-836-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN5 MD
2015-06-17 301-269-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN2 MD
2015-06-08 301-264-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F MT SAVAGE MD
2015-05-28 301-246-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D NANJEMOY MD
2015-05-28 301-417-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WSNGTNZN10 MD
2015-05-28 301-433-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WSHNGTNZN5 MD
2015-05-28 301-485-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WSHNGTNZN6 MD
2015-05-28 301-603-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSNGTNZN11 MD
2015-05-28 301-691-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D POOLESVL MD
2015-05-28 301-900-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2015-05-27 301-200-6XXX 6000–6999Assigned BALTIMORE-WASHINGTON TELEPHONE (BWT) 8697 INDIANHEAD MD
2015-05-27 301-307-7XXX 7000–7999Assigned BALTIMORE-WASHINGTON TELEPHONE (BWT) 8697 WSNG238Z13 MD
2015-05-27 301-690-3XXX 3000–3999Assigned BALTIMORE-WASHINGTON TELEPHONE (BWT) 8697 LEONARDTN MD
2015-05-27 301-691-6XXX 6000–6999Assigned BALTIMORE-WASHINGTON TELEPHONE (BWT) 8697 POOLESVL MD
2015-05-27 301-812-8XXX 8000–8999Assigned BALTIMORE-WASHINGTON TELEPHONE (BWT) 8697 WSNG238Z15 MD
2015-05-26 301-895-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F GRANTSVL MD
2015-05-18 301-269-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN2 MD
2015-05-18 301-269-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN2 MD
2015-05-18 301-269-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN2 MD
2015-05-13 301-747-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN6 MD
2015-05-12 301-242-2XXX 2000–2999Assigned BALTIMORE-WASHINGTON TELEPHONE (BWT) 8697 BRANDYWINE 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.