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
2013-04-04 301-966-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN12 MD
2013-04-04 301-994-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LXTNPKGRML MD
2013-03-28 301-458-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2013-02-28 301-284-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WSNGTNZN10 MD
2013-01-30 301-200-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2013-01-30 301-744-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2013-01-28 301-298-4XXX 4000–4999Assigned VERIZON MARYLAND, INC. 9212 WSNG236Z15 MD
2013-01-28 301-971-5XXX 5000–5999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN6 MD
2013-01-28 301-971-6XXX 6000–6999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN6 MD
2013-01-14 301-978-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSNGTNZN10 MD
2013-01-09 301-304-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WALKERSVL MD
2013-01-09 301-799-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2013-01-03 301-914-1XXX 1000–1999Assigned MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD 676A OAKLAND MD
2012-11-23 301-844-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2012-11-13 301-966-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN12 MD
2012-11-13 301-966-4XXX 4000–4999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN12 MD
2012-11-13 301-966-5XXX 5000–5999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN12 MD
2012-11-13 301-966-8XXX 8000–8999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN12 MD
2012-11-09 301-823-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSNG236Z13 MD
2012-11-01 301-339-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN10 MD
2012-10-26 301-363-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DAMASCS240 MD
2012-10-26 301-799-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2012-10-12 301-612-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 WSNG238Z14 MD
2012-10-10 301-798-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 DAMASCS240 MD
2012-10-05 301-378-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2012-10-05 301-383-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z14 MD
2012-10-04 301-337-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2012-10-04 301-836-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN5 MD
2012-09-20 301-971-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN6 MD
2012-09-20 301-971-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN6 MD
2012-09-13 301-778-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2012-09-13 301-778-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2012-09-13 301-812-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D WSNG238Z15 MD
2012-09-12 301-329-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D ASHTON238 MD
2012-09-12 301-485-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN6 MD
2012-09-12 301-679-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WSNGTNZN12 MD
2012-09-11 301-259-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D TOMPKINSVL MD
2012-09-11 301-685-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D DAMASCS236 MD
2012-09-11 301-691-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D POOLESVL MD
2012-09-11 301-857-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CLEAR SPG MD
2012-08-22 301-971-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN6 MD
2012-08-15 301-684-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D INDIANHEAD MD
2012-08-09 301-276-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2012-08-09 301-276-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2012-08-09 301-276-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2012-08-09 301-683-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2012-08-08 301-200-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2012-08-08 301-200-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2012-08-08 301-541-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN5 MD
2012-08-08 301-640-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D 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.