NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 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 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
2006-02-06 339-221-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MEDFORD MA
2006-01-05 339-236-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HINGHAM MA
2005-12-28 339-244-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BRYANTVL MA
2005-12-28 339-970-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 LEXINGTON MA
2005-12-28 339-970-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LEXINGTON MA
2005-12-28 339-970-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LEXINGTON MA
2005-12-09 339-225-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NEEDHAM MA
2005-12-09 339-225-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NEEDHAM MA
2005-12-09 339-230-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SHARON MA
2005-12-09 339-237-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CANTON MA
2005-12-09 339-237-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CANTON MA
2005-12-09 339-309-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 KINGSTON MA
2005-12-09 339-309-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 KINGSTON MA
2005-12-09 339-469-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ROCKLAND MA
2005-12-09 339-469-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ROCKLAND MA
2005-12-09 339-526-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SCITUATE MA
2005-11-22 339-225-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NEEDHAM MA
2005-11-22 339-225-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NEEDHAM MA
2005-11-22 339-237-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CANTON MA
2005-11-22 339-237-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CANTON MA
2005-11-22 339-309-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 KINGSTON MA
2005-11-22 339-309-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 KINGSTON MA
2005-11-21 339-219-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WAKEFIELD MA
2005-11-16 339-499-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WEYMOUTH MA
2005-11-16 339-499-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WEYMOUTH MA
2005-11-11 339-200-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HINGHAM MA
2005-11-11 339-200-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HINGHAM MA
2005-11-11 339-368-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ARLINGTON MA
2005-10-11 339-440-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LYNN MA
2005-10-11 339-502-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J CANTON MA
2005-10-03 339-224-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MALDEN MA
2005-10-03 339-224-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MALDEN MA
2005-10-03 339-793-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MARSHFIELD MA
2005-09-22 339-230-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SHARON MA
2005-09-22 339-230-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SHARON MA
2005-09-22 339-230-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SHARON MA
2005-09-19 339-499-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WEYMOUTH MA
2005-09-07 339-221-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MEDFORD MA
2005-09-07 339-227-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WOBURN MA
2005-09-07 339-227-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WOBURN MA
2005-08-25 339-293-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MELROSE MA
2005-08-24 339-203-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WAKEFIELD MA
2005-08-24 339-600-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SAUGUS MA
2005-08-24 339-987-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 RANDOLPH MA
2005-08-16 339-933-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BRYANTVL MA
2005-08-02 339-237-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CANTON MA
2005-07-20 339-469-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ROCKLAND MA
2005-07-08 339-222-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WALTHAM MA
2005-07-08 339-223-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LEXINGTON MA
2005-07-06 339-440-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LYNN MA

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.