NumberResearchThousands-blocks in 570-818
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 570-818 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 570 blocks
Most active assignees, all time — NPA 570
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 |
|---|---|---|---|---|---|---|---|
| 2009-03-12 | 570-818-0XXX | 0000–0999 | Assigned | CORE COMMUNICATIONS, INC. - PA | 3806 | MANTZVILLE | PA |
| 2011-05-05 | 570-818-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | MANTZVILLE | PA |
| 2013-10-24 | 570-818-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | MANTZVILLE | PA |
| 2006-10-04 | 570-818-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | MANTZVILLE | PA |
| 2005-07-11 | 570-818-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | MANTZVILLE | PA |
| 2009-12-15 | 570-818-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | MANTZVILLE | PA |
| 2015-11-16 | 570-818-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | MANTZVILLE | PA |
| 2022-07-06 | 570-818-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MANTZVILLE | PA |
| 2015-12-30 | 570-818-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MANTZVILLE | PA |
| 2017-12-19 | 570-818-9XXX | 9000–9999 | Assigned | LIMITLESS MOBILE, LLC | 6921 | MANTZVILLE | PA |
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.