icalculus.com.br - robtex.com

icalculus.com.br

DNSSEC⚠️ Not signed
A68.66.224.51🇺🇸 A2HOSTING68.66.224.0/20 A2 Hosting, Inc.
PTRaz1-ss25.a2hosting.com
NSns1.a2hosting.com ⭐
A13.248.158.180🇺🇸 Amazon13.248.144.0/20
PTRa79764cc55c0ac9c0.awsglobalaccelerator.com
NSns2.a2hosting.com
A75.2.118.134🇺🇸 Amazon75.2.112.0/20
PTRabc65dd9a44b5332f.awsglobalaccelerator.com
NSns3.a2hosting.com
A76.223.26.245🇺🇸 Amazon76.223.16.0/20
PTRa79764cc55c0ac9c0.awsglobalaccelerator.com
NSns4.a2hosting.com
A99.83.147.209🇺🇸 Amazon99.83.144.0/20
PTRabc65dd9a44b5332f.awsglobalaccelerator.com
MXicalculus.com.br ⭐
A68.66.224.51🇺🇸 A2HOSTING68.66.224.0/20 A2 Hosting, Inc.
PTRaz1-ss25.a2hosting.com
TXTv=spf1 +a +mx +ip4:68.66.224.51 +include:spf.a2hosting.com ~all
SOAns1.a2hosting.comroot@az1-ss25.a2hosting.com 2026-02-21 #1

com.br

DNSSEC⚠️ Not signed
NSa.dns.br ⭐ ⚠️ Not in parent delegation
NSb.dns.br ⚠️ Not in parent delegation
NSc.dns.br ⚠️ Not in parent delegation
NSd.dns.br ⚠️ Not in parent delegation
NSe.dns.br ⚠️ Not in parent delegation
NSf.dns.br ⚠️ Not in parent delegation
SOAa.dns.brhostmaster@registro.br serial=2026103480
rank #538974 globally
rank #4017 in the tld
WOT: SAFE (69/100)

MX for

icalculus.com.br

Same first word

icalculus.com.br

DNS History

18 records (6 active, 12 former)

20162017201820192020202120222023202420252026NSns1.a2hosting.comns2.a2hosting.comns3.a2hosting.comns4.a2hosting.comns1.dominios.uol.com.brns1.ipage.comns2.dominios.uol.com.brns2.ipage.comns3.dominios.uol.com.brMXicalculus.com.brmail.icalculus.com.brmx.icalculus.com.brmx.uhserver.comA68.66.224.51187.17.111.9866.96.147.9666.96.149.3270.32.28.57
●NSns1.a2hosting.com2018-07-05 → 2026-04-13 · 3 obs
○ 2017-01-19 04:55:36
● 2018-07-05 02:57:08
● 2026-04-13 20:03:54
○NSns1.dominios.uol.com.br2015-06-14 → 2015-11-17 · 4 obs
● 2015-06-14 09:06:38
● 2015-11-17 14:23:24
○ 2016-02-10 07:09:14
○ 2026-04-13 20:03:54
○NSns1.ipage.com2016-02-10 → 2017-01-19 · 5 obs
○ 2015-11-17 14:23:24
● 2016-02-10 07:09:14
● 2017-01-19 04:55:36
○ 2018-07-05 02:57:08
○ 2026-04-13 20:03:54
●NSns2.a2hosting.com2018-07-05 → 2026-04-13 · 3 obs
○ 2017-01-19 04:55:36
● 2018-07-05 02:57:08
● 2026-04-13 20:03:54
○NSns2.dominios.uol.com.br2015-06-14 → 2015-11-17 · 4 obs
● 2015-06-14 09:06:38
● 2015-11-17 14:23:24
○ 2016-02-10 07:09:14
○ 2026-04-13 20:03:54
○NSns2.ipage.com2016-02-10 → 2017-01-19 · 5 obs
○ 2015-11-17 14:23:24
● 2016-02-10 07:09:14
● 2017-01-19 04:55:36
○ 2018-07-05 02:57:08
○ 2026-04-13 20:03:54
●NSns3.a2hosting.com2018-07-05 → 2026-04-13 · 3 obs
○ 2017-01-19 04:55:36
● 2018-07-05 02:57:08
● 2026-04-13 20:03:54
○NSns3.dominios.uol.com.br2015-06-14 → 2015-11-17 · 4 obs
● 2015-06-14 09:06:38
● 2015-11-17 14:23:24
○ 2016-02-10 07:09:14
○ 2026-04-13 20:03:54
●NSns4.a2hosting.com2018-07-05 → 2026-04-13 · 3 obs
○ 2017-01-19 04:55:36
● 2018-07-05 02:57:08
● 2026-04-13 20:03:54
●MXicalculus.com.br2026-02-28 → 2026-04-13 · 3 obs
○ 2018-07-05 02:57:08
● 2026-02-28 01:32:14
● 2026-04-13 20:03:54
○MXmail.icalculus.com.br2018-07-05 → 2018-07-05 · 4 obs
○ 2017-01-19 04:55:36
● 2018-07-05 02:57:08
○ 2026-02-28 01:32:14
○ 2026-04-13 20:03:54
○MXmx.icalculus.com.br2016-02-10 → 2017-01-19 · 5 obs
○ 2015-11-17 14:23:24
● 2016-02-10 07:09:14
● 2017-01-19 04:55:36
○ 2018-07-05 02:57:08
○ 2026-04-13 20:03:54
○MXmx.uhserver.com2015-06-14 → 2015-11-17 · 4 obs
● 2015-06-14 09:06:38
● 2015-11-17 14:23:24
○ 2016-02-10 07:09:14
○ 2026-04-13 20:03:54
○A187.17.111.982015-06-14 → 2015-11-17 · 4 obs
● 2015-06-14 09:06:38
● 2015-11-17 14:23:24
○ 2016-02-10 07:09:14
○ 2026-04-13 20:03:54
○A66.96.147.962016-02-10 → 2016-02-10 · 4 obs
○ 2015-11-17 14:23:24
● 2016-02-10 07:09:14
○ 2016-04-29 05:14:28
○ 2026-04-13 20:03:54
○A66.96.149.322016-04-29 → 2017-01-19 · 5 obs
○ 2016-02-10 07:09:14
● 2016-04-29 05:14:28
● 2017-01-19 04:55:36
○ 2018-07-05 02:57:08
○ 2026-04-13 20:03:54
●A68.66.224.512026-02-28 → 2026-04-13 · 3 obs
○ 2018-07-05 02:57:08
● 2026-02-28 01:32:14
● 2026-04-13 20:03:54
○A70.32.28.572018-07-05 → 2018-07-05 · 4 obs
○ 2017-01-19 04:55:36
● 2018-07-05 02:57:08
○ 2026-02-28 01:32:14
○ 2026-04-13 20:03:54

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
bra.dns.br, b.dns.br, c.dns.br, d.dns.br...-
icalculus.com.brns4.a2hosting.com, ns2.a2hosting.com, ns1.a2hosting.com, ns3.a2hosting.com-

✅ Authoritative Response

Server:99.83.147.209

NS records: ns4.a2hosting.com, ns2.a2hosting.com, ns1.a2hosting.com, ns3.a2hosting.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for icalculus.com.br (unsigned zone)

⏱️ Timing

Total: 752ms | Queries: -

📄 Records

TypeCountSample Data
A168.66.224.51
NS4ns3.a2hosting.com, ns4.a2hosting.com...
MX1icalculus.com.br (pri: 0)
TXT1v=spf1 +a +mx +ip4:68.66.224.51 +include
SOA1ns1.a2hosting.com root.az1-ss25.a2hostin

Analysis

Mail Server Role

icalculus.com.br serves as the mail server for icalculus.com.br.

IP Addresses

icalculus.com.br points to a single IP address: 68.66.224.51.

Other host names such as mail.bigbrothercreation.com, chaitgear.com, _dc-mx.5921a744ef01.samsdesign.net, otpubs.com and elookahead.com share IP numbers with icalculus.com.br.

Name Servers

icalculus.com.br is delegated to four name servers: ns1.a2hosting.com, ns2.a2hosting.com, ns3.a2hosting.com and ns4.a2hosting.com.

At least part of the name servers for icalculus.com.br are shared with other domains, for instance what-does-it-mean.net, fadden.com, berryvilleautoparts.com, africawanderlust.com and revologybikes.com.

These name servers are commonly used with ns1.mysecurecloudhost.com, ns2.mysecurecloudhost.com, ns3.mysecurecloudhost.com and ns4.mysecurecloudhost.com.

Host names with one IP: ns1.a2hosting.com points to 13.248.158.180; ns2.a2hosting.com points to 75.2.118.134; ns3.a2hosting.com points to 76.223.26.245; ns4.a2hosting.com points to 99.83.147.209.

Mail Servers

Mail for icalculus.com.br is handled by a single mail server, icalculus.com.br.

Host icalculus.com.br points to IP 68.66.224.51.