NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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, all time — NPA 720
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-04-26 | 720-328-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2010-04-22 | 720-439-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2010-04-22 | 720-439-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2010-04-21 | 720-426-0XXX | 0000–0999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-21 | 720-426-9XXX | 9000–9999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2010-04-16 | 720-885-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2010-04-16 | 720-885-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2010-04-16 | 720-885-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2010-04-16 | 720-885-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2010-04-16 | 720-885-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2010-04-16 | 720-885-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2010-04-15 | 720-383-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FORTLUPTON | CO |
| 2010-04-08 | 720-204-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | LONGMONT | CO |
| 2010-04-05 | 720-763-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | DENVER | CO |
| 2010-04-02 | 720-509-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-04-02 | 720-509-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-04-02 | 720-509-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-04-02 | 720-509-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-04-02 | 720-509-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-04-02 | 720-509-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-04-02 | 720-509-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-03-31 | 720-754-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-31 | 720-754-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-26 | 720-775-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2010-03-22 | 720-340-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | LONGMONT | CO |
| 2010-03-17 | 720-383-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | FORTLUPTON | CO |
| 2010-03-10 | 720-383-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CO | 026D | FORTLUPTON | CO |
| 2010-03-10 | 720-475-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2010-03-09 | 720-449-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2010-03-04 | 720-216-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | DENVER | CO |
| 2010-03-02 | 720-295-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | DENVER | CO |
| 2010-03-02 | 720-295-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | DENVER | CO |
| 2010-03-02 | 720-295-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | DENVER | CO |
| 2010-03-02 | 720-295-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | DENVER | CO |
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.