NumberResearchThousands-blocks in 781-228
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 781-228 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 781 blocks
Most active assignees, all time — NPA 781
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-11-03 | 781-228-0XXX | 0000–0999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BRAINTREE | MA |
| 2007-06-26 | 781-228-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BRAINTREE | MA |
| — | 781-228-2XXX | 2000–2999 | Reserved | AT&T - LOCAL | 7421 | BRAINTREE | MA |
| 2014-05-21 | 781-228-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BRAINTREE | MA |
| 2025-06-23 | 781-228-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BRAINTREE | MA |
| 2004-11-30 | 781-228-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | BRAINTREE | MA |
| 2014-08-15 | 781-228-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | BRAINTREE | MA |
| 2013-08-28 | 781-228-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BRAINTREE | MA |
| 2012-04-19 | 781-228-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BRAINTREE | MA |
| 2008-09-09 | 781-228-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BRAINTREE | MA |
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.