first.io - robtex.com

first.io

DNSSEC⚠️ Not signed
A44.228.133.248🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix
PTRec2-44-228-133-248.us-west-2.compute.amazonaws.com
A54.186.0.255🇺🇸 Amazon54.186.0.0/15 EC2 PDX prefix
NSns-249.awsdns-31.com ⭐
A2600:9000:5300:f900::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront
PTRns-249.awsdns-31.com
A205.251.192.249🇺🇸 Amazon205.251.192.0/24 prefix
PTRns-249.awsdns-31.com
NSns-1435.awsdns-51.org
A2600:9000:5305:9b00::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront
PTRns-1435.awsdns-51.org
A205.251.197.155🇺🇸 Amazon205.251.197.0/24 prefix
PTRns-1435.awsdns-51.org
NSns-1913.awsdns-47.co.uk
A2600:9000:5307:7900::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront
PTRns-1913.awsdns-47.co.uk
A205.251.199.121🇺🇸 Amazon205.251.199.0/24 prefix
PTRns-1913.awsdns-47.co.uk
NSns-547.awsdns-04.net
A2600:9000:5302:2300::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront
PTRns-547.awsdns-04.net
A205.251.194.35🇺🇸 Amazon205.251.194.0/24 prefix
PTRns-547.awsdns-04.net
MXus-smtp-inbound-1.mimecast.com ⭐
A170.10.128.141🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.128.221🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.128.242🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.132.141🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.132.221🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.132.242🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
MXus-smtp-inbound-2.mimecast.com ⭐
A170.10.128.141🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.128.221🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.128.242🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.132.141🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.132.221🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
A170.10.132.242🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States
PTRus-smtp-inbound-1.mimecast.com
PTRus-smtp-inbound-2.mimecast.com
TXTMS=ms16807431
TXTbm3wqksgmnw27ly0chn8pj76lh5jnf9n
TXTgoogle-site-verification=Eoq2b6vJ-Dwni7OXkS94H7vi-Zqw1PcqMnAVInsSVVM
TXTv=spf1 include:us._netblocks.mimecast.com include:customeriomail.com include:...
SOAns-249.awsdns-31.comawsdns-hostmaster@amazon.com serial=1

io

DNSSEC🔒 Signed (DS record present)
NSa0.nic.io ⭐
NSa2.nic.io
NSb0.nic.io
NSc0.nic.io
SOAa0.nic.iohostmaster@donuts.email serial=1778335103

Subdomains

balancer.first.io

Same first word

first.sa
first.cl
first.center
first.hu
first.green
first.co.ua
first.events
first.bg
first.com.mx
first.me
first.co.il
first.report
first.or.kr
first.net.ua
first.ua
first.ag
first.si
first.ca
first.ly
first.cn
first.church
first.ie
first.eu
first.gr
first.dev
first.com
first.io
first.ltd
first.com.my
first.lv
first.st
first.name
first.ro
first.club.tw
first.net.my
first.in
first.ne.jp
first.glass
first.vc
first.li
first.com.ua
first.us
first.training
first.tv
first.social
first.com.au
first.lib.ms.us
first.pt
first.es
first.news
first.am
first.tours
first.in-berlin.de
first.tech
first.restaurant
first.camera
first.edu
first.com.tr
first.vip
first.al
first.com.eg
first.fr
first.com.pl
first.com.jo
first.de
first.com.qa
first.global
first.digital
first.plumbing
first.dp.ua
first.vn
first.pe.kr
first.games
first.myshopify.com
first.email
first.rs
first.camp
first.tools
first.bank
first.pet
first.ventures
first.gov.il
first.to
first.com.tw
first.com.es
first.co.uk
first.net
first.wtf
first.farm
first.biz
first.info
first.uz
first.vote
first.school
first.today
first.no
first.pictures
first.org
first.sg
first.plus
first.at
first.capital
first.media
first.cash
first.bz
first.jp.net
first.academy
first.in.ua
first.run
first.fish
first.dk

Similar names

frits.ru
frits.co
siftr.org
siftr.co
srfit.ch
frits.it
istrf.com
ftris.me
itrsf.com
frits.ca
frist.be
fistr.com
fisrt.com
frits.in
istrf.org
sitfr.it
frits.us
srfit.com
fisrt.net
frits.nl
frist.us
frtis.vip
strfi.com
rifst.ru
frits.de
frist.com.cn
frits.at
frist.org
srfti.ac.in
frist.dk
ritsf.com
rifts.to
frist.com
frits.ch
irtfs.com
rftsi.com
rifts.finance
fsirt.com
fsrit.com
frits.com

DNS History

28 records (8 active, 20 former)

201820192020202120222023202420252026NSns-1435.awsdns-51.orgns-1913.awsdns-47.co.ukns-249.awsdns-31.comns-547.awsdns-04.netMXus-smtp-inbound-1.mimecast.comus-smtp-inbound-2.mimecast.comalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comA44.228.133.24854.186.0.255100.22.169.134159.203.104.8834.208.91.8134.211.13.13935.155.235.25135.162.75.16935.167.137.13344.224.217.8044.240.109.15244.242.93.14744.253.121.2152.25.143.7052.88.64.20054.148.121.854.201.2.126
●NSns-1435.awsdns-51.org2017-01-05 → 2026-05-09 · 2 obs
● 2017-01-05 09:24:00
● 2026-05-09 14:20:52
●NSns-1913.awsdns-47.co.uk2017-01-05 → 2026-05-09 · 2 obs
● 2017-01-05 09:24:00
● 2026-05-09 14:20:52
●NSns-249.awsdns-31.com2017-01-05 → 2026-05-09 · 2 obs
● 2017-01-05 09:24:00
● 2026-05-09 14:20:52
●NSns-547.awsdns-04.net2017-01-05 → 2026-05-09 · 2 obs
● 2017-01-05 09:24:00
● 2026-05-09 14:20:52
○MXalt1.aspmx.l.google.com2017-01-05 → 2017-01-05 · 3 obs
● 2017-01-05 09:24:00
○ 2026-02-17 02:40:16
○ 2026-05-09 14:20:52
○MXalt2.aspmx.l.google.com2017-01-05 → 2017-01-05 · 3 obs
● 2017-01-05 09:24:00
○ 2026-02-17 02:40:16
○ 2026-05-09 14:20:52
○MXaspmx.l.google.com2017-01-05 → 2017-01-05 · 3 obs
● 2017-01-05 09:24:00
○ 2026-02-17 02:40:16
○ 2026-05-09 14:20:52
○MXaspmx2.googlemail.com2017-01-05 → 2017-01-05 · 3 obs
● 2017-01-05 09:24:00
○ 2026-02-17 02:40:16
○ 2026-05-09 14:20:52
○MXaspmx3.googlemail.com2017-01-05 → 2017-01-05 · 3 obs
● 2017-01-05 09:24:00
○ 2026-02-17 02:40:16
○ 2026-05-09 14:20:52
●MXus-smtp-inbound-1.mimecast.com2026-02-17 → 2026-05-09 · 3 obs
○ 2017-01-05 09:24:00
● 2026-02-17 02:40:16
● 2026-05-09 14:20:52
●MXus-smtp-inbound-2.mimecast.com2026-02-17 → 2026-05-09 · 3 obs
○ 2017-01-05 09:24:00
● 2026-02-17 02:40:16
● 2026-05-09 14:20:52
○A100.22.169.1342026-04-03 → 2026-04-08 · 5 obs
○ 2026-03-16 20:52:24
● 2026-04-03 21:52:34
● 2026-04-08 23:34:14
○ 2026-04-22 02:25:18
○ 2026-05-09 14:20:52
○A159.203.104.882017-01-05 → 2017-01-05 · 3 obs
● 2017-01-05 09:24:00
○ 2026-02-17 02:40:16
○ 2026-05-09 14:20:52
○A34.208.91.812026-04-03 → 2026-04-06 · 5 obs
○ 2026-03-16 20:52:24
● 2026-04-03 21:52:34
● 2026-04-06 04:04:24
○ 2026-04-08 23:34:14
○ 2026-05-09 14:20:52
○A34.211.13.1392026-02-17 → 2026-02-17 · 4 obs
○ 2017-01-05 09:24:00
● 2026-02-17 02:40:16
○ 2026-03-05 19:36:48
○ 2026-05-09 14:20:52
○A35.155.235.2512026-04-22 → 2026-04-22 · 5 obs
○ 2026-04-08 23:34:14
● 2026-04-22 02:25:18
● 2026-04-22 04:23:04
○ 2026-04-25 12:20:02
○ 2026-05-09 14:20:52
○A35.162.75.1692026-04-22 → 2026-04-25 · 4 obs
○ 2026-04-08 23:34:14
● 2026-04-22 02:25:18
● 2026-04-25 12:20:02
○ 2026-05-09 14:20:52
○A35.167.137.1332026-04-08 → 2026-04-08 · 4 obs
○ 2026-04-06 04:04:24
● 2026-04-08 23:34:14
○ 2026-04-22 02:25:18
○ 2026-05-09 14:20:52
○A44.224.217.802026-03-05 → 2026-03-05 · 4 obs
○ 2026-02-17 02:40:16
● 2026-03-05 19:36:48
○ 2026-03-16 16:30:18
○ 2026-05-09 14:20:52
●A44.228.133.2482026-05-09 → 2026-05-09 · 2 obs
○ 2026-04-25 12:20:02
● 2026-05-09 14:20:52
○A44.240.109.1522026-03-16 → 2026-03-16 · 5 obs
○ 2026-03-05 19:36:48
● 2026-03-16 16:30:18
● 2026-03-16 20:52:24
○ 2026-04-03 21:52:34
○ 2026-05-09 14:20:52
○A44.242.93.1472026-03-05 → 2026-03-05 · 4 obs
○ 2026-02-17 02:40:16
● 2026-03-05 19:36:48
○ 2026-03-16 16:30:18
○ 2026-05-09 14:20:52
○A44.253.121.212026-04-25 → 2026-04-25 · 3 obs
○ 2026-04-22 04:23:04
● 2026-04-25 12:20:02
○ 2026-05-09 14:20:52
○A52.25.143.702026-02-17 → 2026-05-09 · 2 obs
○ 2026-02-17 02:40:16
○ 2026-05-09 14:20:52
○A52.88.64.2002026-03-16 → 2026-03-16 · 5 obs
○ 2026-03-05 19:36:48
● 2026-03-16 16:30:18
● 2026-03-16 20:52:24
○ 2026-04-03 21:52:34
○ 2026-05-09 14:20:52
○A54.148.121.82026-02-17 → 2026-02-17 · 4 obs
○ 2017-01-05 09:24:00
● 2026-02-17 02:40:16
○ 2026-03-05 19:36:48
○ 2026-05-09 14:20:52
●A54.186.0.2552026-05-09 → 2026-05-09 · 2 obs
○ 2026-04-25 12:20:02
● 2026-05-09 14:20:52
○A54.201.2.1262026-02-17 → 2026-05-09 · 2 obs
○ 2026-02-17 02:40:16
○ 2026-05-09 14:20:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
ioa0.nic.io, a2.nic.io, b0.nic.io, c0.nic.io-
first.ions-1913.awsdns-47.co.uk, ns-1435.awsdns-51.org, ns-249.awsdns-31.com, ns-547.awsdns-04.net-

✅ Authoritative Response

Server:205.251.197.155

NS records: ns-1913.awsdns-47.co.uk, ns-1435.awsdns-51.org, ns-249.awsdns-31.com, ns-547.awsdns-04.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for first.io (unsigned zone)

⏱️ Timing

Total: 676ms | Queries: -

📄 Records

TypeCountSample Data
A254.186.0.255, 44.228.133.248
NS4ns-1435.awsdns-51.org, ns-1913.awsdns-47.co.uk...
MX2us-smtp-inbound-1.mimecast.com (pri: 10), us-smtp-inbound-2.mimecast.com (pri: 10)
TXT4MS=ms16807431, bm3wqksgmnw27ly0chn8pj76lh5jnf9n...
SOA1ns-249.awsdns-31.com awsdns-hostmaster.a

Analysis

Hierarchy

The parent of balancer.first.io is first.io.

IP Addresses

Two IP numbers are pointed to by first.io: 44.228.133.248 and 54.186.0.255.

Other host names, for instance ec2-54-186-0-255.us-west-2.compute.amazonaws.com, share IP numbers with first.io.

Name Servers

first.io delegates to four name servers: ns-249.awsdns-31.com, ns-547.awsdns-04.net, ns-1435.awsdns-51.org and ns-1913.awsdns-47.co.uk.

first.io at least partially shares name servers with other domains, for instance lokomix.com, wwprojects.com, castlegar.ca, 5gbet3.com and chhsathletics.org.

These name servers are commonly used with ns-1159.awsdns-16.org, ns-15.awsdns-01.com, ns-1642.awsdns-13.co.uk, ns-874.awsdns-45.net, ns-26.awsdns-03.com and ns-1090.awsdns-08.org.

Host names with two IP numbers: ns-249.awsdns-31.com points to 2600:9000:5300:f900::1 and 205.251.192.249; ns-547.awsdns-04.net points to 2600:9000:5302:2300::1 and 205.251.194.35; ns-1435.awsdns-51.org points to 2600:9000:5305:9b00::1 and 205.251.197.155; ns-1913.awsdns-47.co.uk points to 2600:9000:5307:7900::1 and 205.251.199.121.

Mail Servers

first.io is handled by two mail servers: us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com.

first.io uses the same mail server setup as other domains, for instance icorps.com, bpsjet.com, crtecchina.com, keefebartels.com and uniformadvantage.com.

first.io shares some mail servers with other domains, including combinedservices.com, newcoast.com, swnow.eu and advantedgehr.com.

Host names with six IP numbers

us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com each point to: 170.10.128.141, 170.10.128.221, 170.10.128.242, 170.10.132.141, 170.10.132.221 and 170.10.132.242

Host names that point to 170.10.128.141: us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com

Host names that point to 170.10.128.221: us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com

Host names that point to 170.10.128.242: us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com

Host names that point to 170.10.132.141: us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com

Host names that point to 170.10.132.221: us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com

Host names that point to 170.10.132.242: us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com