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
2009-05-26 301-225-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNG236Z14 MD
2009-05-26 301-225-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNG236Z14 MD
2009-05-26 301-225-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNG236Z14 MD
2009-05-04 301-832-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2009-05-04 301-956-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2009-04-02 301-956-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2009-03-04 301-533-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E OAKLAND MD
2009-03-04 301-956-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2009-02-06 301-363-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DAMASCS240 MD
2009-02-02 301-956-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J GAITHERSBG MD
2009-01-05 301-956-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2008-12-23 301-202-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2008-12-17 301-679-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN12 MD
2008-12-09 301-525-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2008-11-17 301-244-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2008-11-17 301-244-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2008-11-17 301-246-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NANJEMOY MD
2008-11-17 301-259-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F TOMPKINSVL MD
2008-11-17 301-272-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2008-11-17 301-375-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2008-11-17 301-458-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2008-11-17 301-485-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN6 MD
2008-11-17 301-539-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LA PLATA MD
2008-11-17 301-541-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2008-11-17 301-541-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2008-11-17 301-920-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN3 MD
2008-11-14 301-363-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 DAMASCS240 MD
2008-11-05 301-525-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2008-11-05 301-678-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HANCOCK MD
2008-11-05 301-799-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F KEEDYSVL MD
2008-11-05 301-842-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CLEAR SPG MD
2008-10-16 301-765-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2008-10-16 301-795-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2008-10-16 301-795-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2008-10-09 301-244-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN3 MD
2008-10-03 301-525-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GAITHERSBG MD
2008-10-03 301-832-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2008-09-24 301-328-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN3 MD
2008-09-24 301-328-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN3 MD
2008-09-24 301-328-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN3 MD
2008-09-24 301-328-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN3 MD
2008-09-24 301-433-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN5 MD
2008-09-24 301-458-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN4 MD
2008-09-24 301-618-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN4 MD
2008-09-24 301-778-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN5 MD
2008-09-12 301-283-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN6 MD
2008-09-12 301-686-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN6 MD
2008-09-12 301-686-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN6 MD
2008-09-12 301-852-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN4 MD
2008-09-11 301-823-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNG236Z13 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.