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
2010-07-20 301-684-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2010-07-20 301-690-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LEONARDTN MD
2010-07-16 301-965-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN6 MD
2010-07-15 301-684-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2010-07-08 301-800-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2010-06-28 301-968-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN2 MD
2010-06-14 301-256-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2010-06-14 301-256-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2010-06-07 301-366-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2010-06-07 301-366-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2010-06-07 301-366-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2010-06-03 301-377-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2010-05-28 301-278-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2010-05-28 301-288-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN12 MD
2010-05-28 301-304-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WALKERSVL MD
2010-05-28 301-456-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2010-05-28 301-686-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN6 MD
2010-05-28 301-798-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DAMASCS240 MD
2010-05-28 301-852-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2010-05-28 301-852-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2010-05-28 301-852-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2010-05-28 301-882-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NEW MARKET MD
2010-05-27 301-202-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-05-27 301-202-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-05-26 301-202-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN2 MD
2010-05-05 301-852-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2010-04-30 301-800-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HAGERSTOWN MD
2010-04-30 301-800-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HAGERSTOWN MD
2010-04-28 301-377-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2010-04-05 301-377-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2010-03-31 301-400-0XXX 0000–0999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-3XXX 3000–3999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-4XXX 4000–4999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-5XXX 5000–5999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-6XXX 6000–6999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-8XXX 8000–8999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-31 301-400-9XXX 9000–9999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-02-23 301-359-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WESTERNPT MD
2010-02-23 301-660-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2010-02-23 301-678-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HANCOCK MD
2010-02-23 301-842-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CLEAR SPG MD
2010-02-23 301-895-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J GRANTSVL MD
2010-02-18 301-241-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HIGHFIELD MD
2010-02-11 301-256-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2010-02-11 301-323-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2010-02-11 301-323-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2010-02-04 301-956-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG 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.