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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-08-09 301-960-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2011-08-08 301-200-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2011-08-08 301-310-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2011-08-08 301-660-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2011-08-08 301-660-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2011-08-08 301-892-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2011-07-29 301-200-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 INDIANHEAD MD
2011-07-22 301-965-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN6 MD
2011-07-05 301-200-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D INDIANHEAD MD
2011-07-05 301-310-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2011-07-05 301-373-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2011-07-05 301-500-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2011-07-05 301-500-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN2 MD
2011-07-05 301-660-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2011-07-05 301-660-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2011-06-27 301-378-3XXX 3000–3999Assigned METROPCS, INC. 5562 FREDERICK MD
2011-06-27 301-378-4XXX 4000–4999Assigned METROPCS, INC. 5562 FREDERICK MD
2011-06-24 301-310-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2011-06-24 301-543-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2011-06-15 301-542-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2011-06-15 301-892-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2011-06-15 301-944-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2011-06-07 301-494-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNG238Z15 MD
2011-06-07 301-494-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNG238Z15 MD
2011-06-07 301-690-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LEONARDTN MD
2011-06-07 301-820-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D GAITHERSBG MD
2011-06-07 301-882-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NEW MARKET MD
2011-06-07 301-969-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BRUNSWICK MD
2011-05-27 301-407-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J GAITHERSBG MD
2011-05-24 301-310-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2011-05-17 301-273-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN3 MD
2011-05-17 301-820-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J GAITHERSBG MD
2011-05-16 301-971-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN6 MD
2011-05-04 301-246-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NANJEMOY MD
2011-05-04 301-310-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2011-05-04 301-310-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2011-05-04 301-392-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LA PLATA MD
2011-05-04 301-744-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2011-05-04 301-892-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2011-05-03 301-800-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2011-04-20 301-388-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN12 MD
2011-04-20 301-679-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN12 MD
2011-04-20 301-887-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2011-04-20 301-887-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2011-04-20 301-892-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2011-04-20 301-892-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2011-04-20 301-893-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN6 MD
2011-04-20 301-893-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN6 MD
2011-04-20 301-905-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2011-04-20 301-909-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 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.