CF1759856360348-tsm20251005211530

WWW.RTSAK.COM - btw.fastmail.us

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btw.fastmail.us checked at 2025-10-07T16:59:20.320Z 365ms 87/87/87 100% R:10

btw.fastmail.us

MXin1-smtp.messagingengine.com
A103.168.172.216🇺🇸 FASTMAILPTYLTD-AS-AP
PTRphl-mx-01.messagingengine.com
A103.168.172.217🇺🇸 FASTMAILPTYLTD-AS-AP
PTRphl-mx-02.messagingengine.com
A103.168.172.218🇺🇸 FASTMAILPTYLTD-AS-AP
PTRphl-mx-03.messagingengine.com
A103.168.172.219🇺🇸 FASTMAILPTYLTD-AS-AP
PTRphl-mx-04.messagingengine.com
A103.168.172.220🇺🇸 FASTMAILPTYLTD-AS-AP
PTRphl-mx-05.messagingengine.com
A103.168.172.221🇺🇸 FASTMAILPTYLTD-AS-AP
PTRphl-mx-06.messagingengine.com
A103.168.172.222🇺🇸 FASTMAILPTYLTD-AS-AP
PTRphl-mx-07.messagingengine.com
A103.168.172.223🇺🇸 FASTMAILPTYLTD-AS-AP
PTRphl-mx-08.messagingengine.com
MXin2-smtp.messagingengine.com
A202.12.124.216 FASTMAILPTYLTD-AS-AP
PTRstl-mx-01.messagingengine.com
A202.12.124.217 FASTMAILPTYLTD-AS-AP
PTRstl-mx-02.messagingengine.com
A103.168.172.37🇺🇸 FASTMAILPTYLTD-AS-AP
PTRuserweb.fastmail.com
A103.168.172.52🇺🇸 FASTMAILPTYLTD-AS-AP
PTRuserweb.fastmail.com

fastmail.us

NSfmns1.messagingengine.com
NSfmns2.messagingengine.com
MXin1-smtp.messagingengine.com
MXin2-smtp.messagingengine.com
A103.168.172.65🇺🇸 FASTMAILPTYLTD-AS-AP

Starts with same word

Starts similarily

AI analysis

btw.fastmail.us points to two IPs: 103.168.172.37 and 103.168.172.52.

Other host names, for instance yavinholdings.com, roquefort.martijnwalraven.com, ns3.iaal.us, entropy.slashnull.org and cyan.blue share IP numbers with btw.fastmail.us.

Two mail servers handle btw.fastmail.us: in1-smtp.messagingengine.com and in2-smtp.messagingengine.com.

btw.fastmail.us shares the same mail server setup as other domains, including casualprogrammer.com, wraxton.com, movsci.com, steel4.com and ciadurante.com.

btw.fastmail.us shares some mail servers with other domains, for instance hh0882.net and splendidproductions.co.uk.

Eight IP numbers for in1-smtp.messagingengine.com: in1-smtp.messagingengine.com points to 103.168.172.216, 103.168.172.217, 103.168.172.218, 103.168.172.219, 103.168.172.220, 103.168.172.221, 103.168.172.222 and 103.168.172.223. Two IP numbers for in2-smtp.messagingengine.com: in2-smtp.messagingengine.com points to 202.12.124.216 and 202.12.124.217.

Perform reverse DNS lookup as well as normal forward DNS. Check Autonomous System Numbers (ASNs) and BGP connections between Internet Service Providers.
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yTcuREL CF johedugfp 2025-10-07