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 731
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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-01-27 | 731-331-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BOLIVAR | TN |
| 2026-01-27 | 731-710-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HALLS | TN |
| 2024-12-18 | 731-283-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DYER | TN |
| 2024-12-18 | 731-312-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CEDARGROVE | TN |
| 2023-11-30 | 731-788-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MICHIE | TN |
| 2023-08-23 | 731-210-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | COTTAGEGRV | TN |
| 2023-07-19 | 731-280-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SHILOH | TN |
| 2023-06-26 | 731-477-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MEDINA | TN |
| 2023-04-19 | 731-321-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SCOTTSHILL | TN |
| 2023-04-19 | 731-858-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SARDIS | TN |
| 2022-11-02 | 731-275-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PALMERSVL | TN |
| 2022-09-09 | 731-276-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LATHAM | TN |
| 2022-08-26 | 731-274-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SIDONIA | TN |
| 2022-06-29 | 731-900-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BIG SANDY | TN |
| 2021-10-12 | 731-699-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DRESDEN | TN |
| 2019-09-11 | 731-200-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TRENTON | TN |
| 2018-10-30 | 731-278-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CYPRESS | TN |
| 2018-04-20 | 731-296-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TRIMBLE | TN |
| 2018-03-27 | 731-243-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HENRY | TN |
| 2018-03-05 | 731-656-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MAURY CITY | TN |
| 2018-03-05 | 731-662-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ATWOOD | TN |
| 2018-03-05 | 731-669-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TREZEVANT | TN |
| 2018-03-05 | 731-696-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ALAMO | TN |
| 2017-06-07 | 731-798-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LEXINGTON | TN |
| 2016-10-14 | 731-628-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | NEWBERN | TN |
| 2016-09-19 | 731-924-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PARIS | TN |
| 2016-03-11 | 731-309-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MILLEDGEVL | TN |
| 2016-03-11 | 731-315-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ADAMSVILLE | TN |
| 2014-10-09 | 731-207-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MCKENZIE | TN |
| 2014-04-17 | 731-736-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | TN |
| 2013-04-24 | 731-238-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MILAN | TN |
| 2013-04-15 | 731-407-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PARIS | TN |
| 2013-03-06 | 731-736-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | TN |
| 2012-08-24 | 731-281-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MARTIN | TN |
| 2012-07-19 | 731-599-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | UNION CITY | TN |
| 2011-05-27 | 731-727-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SAVANNAH | TN |
| 2010-01-19 | 731-337-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HUMBOLDT | TN |
| 2009-08-05 | 731-249-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LEXINGTON | TN |
| 2008-11-25 | 731-407-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PARIS | TN |
| 2008-11-10 | 731-251-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DECATURVL | TN |
| 2008-11-10 | 731-257-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PARSONS | TN |
| 2007-11-13 | 731-736-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | TN |
| 2006-08-11 | 731-281-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MARTIN | TN |
| 2006-08-07 | 731-736-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | TN |
| 2005-12-30 | 731-681-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GLEASON | TN |
| 2005-12-07 | 731-271-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SO FULTON | TN |
| 2005-12-06 | 731-419-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIPLEY | TN |
| 2005-11-30 | 731-535-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HUNTINGDON | TN |
| 2005-11-22 | 731-678-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GREENFIELD | TN |
| 2005-11-09 | 731-213-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CAMDEN | TN |
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.