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 305
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 |
|---|---|---|---|---|---|---|---|
| 2018-05-11 | 305-530-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2015-12-30 | 305-783-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2015-04-13 | 305-780-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2014-10-21 | 305-650-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2014-09-05 | 305-204-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2014-06-04 | 305-952-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2014-06-04 | 305-952-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2014-02-14 | 305-998-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2013-11-04 | 305-922-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2013-05-17 | 305-549-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2012-12-20 | 305-440-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2012-12-20 | 305-440-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2011-08-31 | 305-414-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2011-04-04 | 305-364-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2011-04-04 | 305-646-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2010-09-07 | 305-760-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2010-06-14 | 305-453-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2010-06-04 | 305-705-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2010-04-15 | 305-392-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2010-04-15 | 305-418-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2010-04-15 | 305-631-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2010-04-15 | 305-735-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2010-03-08 | 305-639-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2010-03-08 | 305-640-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-10-12 | 305-381-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-08-20 | 305-396-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2009-04-16 | 305-392-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-04-16 | 305-400-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-04-16 | 305-846-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-04-16 | 305-982-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-03-19 | 305-517-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
| 2009-03-19 | 305-705-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2009-03-19 | 305-705-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2009-02-26 | 305-964-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | PERRINE | FL |
| 2009-02-19 | 305-603-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-02-19 | 305-603-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-02-19 | 305-603-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2009-02-19 | 305-640-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2008-06-06 | 305-974-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2008-06-06 | 305-974-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2008-01-31 | 305-381-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2008-01-31 | 305-627-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2008-01-31 | 305-816-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2008-01-31 | 305-960-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2008-01-31 | 305-967-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2007-10-31 | 305-200-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2007-10-31 | 305-200-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIAMI | FL |
| 2007-10-22 | 305-749-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTH DADE | FL |
| 2006-12-07 | 305-509-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEYS | FL |
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.