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
2006-09-12 301-326-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN3 MD
2006-09-11 301-272-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-09-06 301-312-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN2 MD
2006-09-06 301-312-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN2 MD
2006-08-31 301-358-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z15 MD
2006-08-29 301-312-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2006-08-29 301-312-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2006-08-29 301-312-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2006-08-29 301-312-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2006-08-29 301-312-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2006-08-29 301-312-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2006-08-29 301-312-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2006-08-14 301-841-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-08-04 301-485-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN6 MD
2006-07-25 301-243-0XXX 0000–0999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-3XXX 3000–3999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-4XXX 4000–4999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-5XXX 5000–5999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-6XXX 6000–6999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-8XXX 8000–8999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-25 301-243-9XXX 9000–9999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2006-07-21 301-850-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z14 MD
2006-07-17 301-803-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-07-17 301-803-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-07-17 301-828-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-07-07 301-222-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2006-07-07 301-600-0XXX 0000–0999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-3XXX 3000–3999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-4XXX 4000–4999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-5XXX 5000–5999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-6XXX 6000–6999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-8XXX 8000–8999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-07 301-600-9XXX 9000–9999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2006-07-06 301-542-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2006-07-06 301-575-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-07-06 301-575-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-07-06 301-821-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-07-06 301-875-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-07-06 301-974-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-07-06 301-974-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-07-06 301-974-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2006-06-30 301-575-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LAUREL236 MD
2006-06-22 301-328-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN3 MD
2006-06-05 301-542-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF 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.