NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 339
NEW CINGULAR WIRELESS PCS, LLC - DC 1
EXIANT COMMUNICATIONS LLC 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
2011-11-02 339-202-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON MA
2011-11-02 339-202-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON MA
2011-11-02 339-202-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON MA
2011-11-02 339-202-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON MA
2011-11-02 339-202-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON MA
2011-10-04 339-236-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HINGHAM MA
2011-09-14 339-244-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRYANTVL MA
2011-07-14 339-502-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CANTON MA
2011-07-12 339-235-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRAINTREE MA
2011-07-06 339-203-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WAKEFIELD MA
2011-07-06 339-235-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BRAINTREE MA
2011-07-06 339-236-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HINGHAM MA
2011-06-17 339-204-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F DEDHAM MA
2011-06-03 339-368-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ARLINGTON MA
2011-05-31 339-204-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DEDHAM MA
2011-05-31 339-226-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E REVERE MA
2011-05-31 339-499-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WEYMOUTH MA
2011-05-31 339-674-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MEDFORD MA
2011-05-31 339-707-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ARLINGTON MA
2011-05-31 339-788-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ROCKLAND MA
2011-05-31 339-970-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E LEXINGTON MA
2011-05-05 339-235-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BRAINTREE MA
2011-03-03 339-203-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WAKEFIELD MA
2011-03-03 339-234-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BURLINGTON MA
2010-12-13 339-364-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SHARON MA
2010-12-02 339-368-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ARLINGTON MA
2010-11-03 339-236-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HINGHAM MA
2010-10-18 339-224-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MALDEN MA
2010-10-14 339-204-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DEDHAM MA
2010-10-14 339-204-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DEDHAM MA
2010-08-17 339-204-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DEDHAM MA
2010-08-17 339-226-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E REVERE MA
2010-08-17 339-368-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ARLINGTON MA
2010-08-17 339-469-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ROCKLAND MA
2010-08-17 339-674-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MEDFORD MA
2010-08-17 339-927-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WOBURN MA
2010-08-03 339-235-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BRAINTREE MA
2010-07-16 339-970-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E LEXINGTON MA
2010-07-13 339-234-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BURLINGTON MA
2010-05-27 339-236-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E HINGHAM MA
2010-05-27 339-244-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRYANTVL MA
2010-05-27 339-502-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CANTON MA
2010-03-04 339-788-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ROCKLAND MA
2010-02-26 339-221-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MEDFORD MA
2010-02-23 339-987-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 RANDOLPH MA
2010-02-04 339-832-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 KINGSTON MA
2010-01-25 339-203-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WAKEFIELD MA
2010-01-22 339-221-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MEDFORD MA
2010-01-22 339-234-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BURLINGTON MA
2010-01-22 339-364-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SHARON MA

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.