140.239.221.131 — Ashburn, Virginia, 🇺🇸 USA · AS2828

PTR

mx.nationaloptical.com

A record for

`mailserver.swiftoptics.com`
	A	140.239.221.131

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Ashburn, Virginia, 🇺🇸 USA

^{🇺🇸 AS2828140.239.0.0/16 Proxy registration to prevent harm from ARIN-NONAUTH shutdown}

140.239.221.131 Ashburn, Virginia, 🇺🇸 USA Courtesy of