NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 307
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 |
|---|---|---|---|---|---|---|---|
| 2026-02-25 | 307-490-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | UPTON | WY |
| 2025-10-07 | 307-391-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MOORCROFT | WY |
| 2021-08-09 | 307-480-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | THERMOPOLS | WY |
| 2020-09-03 | 307-225-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LARAMIE | WY |
| 2019-10-08 | 307-629-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | NEWCASTLE | WY |
| 2015-10-29 | 307-388-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | WORLAND | WY |
| 2014-10-14 | 307-439-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2014-05-05 | 307-369-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2014-04-29 | 307-206-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LANDER | WY |
| 2014-04-23 | 307-429-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SHERIDAN | WY |
| 2013-11-15 | 307-264-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | WY |
| 2013-09-18 | 307-333-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2012-06-07 | 307-514-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2012-03-19 | 307-337-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2012-02-07 | 307-363-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GILLETTE | WY |
| 2012-02-07 | 307-514-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2011-11-03 | 307-337-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2011-09-20 | 307-369-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2011-07-18 | 307-337-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2011-03-17 | 307-201-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | WY |
| 2011-01-11 | 307-337-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2011-01-11 | 307-369-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2010-01-19 | 307-426-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2009-05-08 | 307-463-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIVERTON | WY |
| 2009-02-03 | 307-514-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2008-10-22 | 307-655-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SHERIDAN | WY |
| 2008-10-22 | 307-670-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GILLETTE | WY |
| 2008-10-06 | 307-460-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LARAMIE | WY |
| 2008-09-30 | 307-200-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | WY |
| 2008-09-30 | 307-213-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CODY | WY |
| 2008-07-02 | 307-670-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GILLETTE | WY |
| 2007-11-26 | 307-333-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2007-11-19 | 307-763-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SHERIDAN | WY |
| 2007-09-21 | 307-460-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LARAMIE | WY |
| 2007-09-12 | 307-514-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2007-05-25 | 307-426-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2007-05-15 | 307-315-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2006-09-20 | 307-333-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2006-09-20 | 307-514-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2006-08-17 | 307-257-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GILLETTE | WY |
| 2006-05-05 | 307-278-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BUFFALO | WY |
| 2006-01-03 | 307-333-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2006-01-03 | 307-514-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2005-12-20 | 307-328-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RAWLINS | WY |
| 2005-12-20 | 307-578-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CODY | WY |
| 2005-12-14 | 307-203-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | WY |
| 2005-11-22 | 307-335-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LANDER | WY |
| 2005-11-22 | 307-463-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIVERTON | WY |
| 2005-10-04 | 307-514-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2005-06-13 | 307-257-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GILLETTE | WY |
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.