`calcmastersoftware.com`

DNSSEC	⚠️ Not signed
A	2a06:2ec0:1::135^{🇳🇱 AS-ZXCS2a06:2ec0::/32}
		PTR	`web0135.zxcs.nl`
A	185.104.29.106^{🇳🇱 AS-ZXCS185.104.29.0/24}
NS	`ns.zxcs.nl` ⭐
		A	2a06:2ec0:1::10^{🇳🇱 AS-ZXCS2a06:2ec0::/32}
			PTR	`ns1.zxcs.nl`
		A	185.104.28.19^{🇳🇱 AS-ZXCS185.104.28.0/24}
			PTR	`ns1.zxcs.nl`
NS	`ns.zxcs.be`
		A	2a03:b0c0:3:d0::116:2001^{🇩🇪 DIGITALOCEAN2a03:b0c0:3::/48 DigitalOcean}
			PTR	`ns2.zxcs.nl`
		A	46.101.179.64^{🇩🇪 DIGITALOCEAN46.101.128.0/17 DigitalOcean}
			PTR	`ns2.zxcs.nl`
NS	`ns.zxcs.eu`
		A	2a03:b0c0:2:d0::57:1001^{🇳🇱 DIGITALOCEAN2a03:b0c0:2::/48 DigitalOcean}
			PTR	`ns3.zxcs.nl`
		A	178.62.208.8^{🇳🇱 DIGITALOCEAN178.62.192.0/18 DigitalOcean}
			PTR	`ns3.zxcs.nl`
MX	`spamrelay.zxcs.nl` ⭐
		A	2a06:2ec0:1::ffec^{🇳🇱 AS-ZXCS2a06:2ec0::/32}
			PTR	`spamrelay.zxcs.nl`
		A	185.104.28.12^{🇳🇱 AS-ZXCS185.104.28.0/24}
			PTR	`spamrelay.zxcs.nl`
TXT	`v=spf1 a mx ip4:185.104.29.106 ip6:2a06:2ec0:1:0:0:0:0:135 include:filter-out...`
SOA	`ns.zxcs.nl`hostmaster@calcmastersoftware.com 2026-03-29 #3

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1777051416

Same first word

calcmastersoftware.com

DNS History

12 records (6 active, 6 former)

●NSns.zxcs.be2026-02-19 → 2026-04-24 · 3 obs

○ 2017-05-31 07:57:16
● 2026-02-19 14:05:40
● 2026-04-24 17:52:16

●NSns.zxcs.eu2026-02-19 → 2026-04-24 · 3 obs

○ 2017-05-31 07:57:16
● 2026-02-19 14:05:40
● 2026-04-24 17:52:16

●NSns.zxcs.nl2026-02-19 → 2026-04-24 · 3 obs

○ 2017-05-31 07:57:16
● 2026-02-19 14:05:40
● 2026-04-24 17:52:16

○NSns1.openeye.nl2008-03-19 → 2017-05-31 · 4 obs

● 2008-03-19 17:58:56
● 2017-05-31 07:57:16
○ 2026-02-19 14:05:40
○ 2026-04-24 17:52:16

○NSns2.openeye.nl2008-03-19 → 2017-05-31 · 4 obs

● 2008-03-19 17:58:56
● 2017-05-31 07:57:16
○ 2026-02-19 14:05:40
○ 2026-04-24 17:52:16

○MXsmtp1.openeye.nl2008-03-19 → 2017-05-31 · 4 obs

● 2008-03-19 17:58:56
● 2017-05-31 07:57:16
○ 2026-02-19 14:05:40
○ 2026-04-24 17:52:16

○MXsmtp2.openeye.nl2008-03-19 → 2008-03-19 · 3 obs

● 2008-03-19 17:58:56
○ 2015-08-18 04:41:30
○ 2026-04-24 17:52:16

●MXspamrelay.zxcs.nl2026-02-19 → 2026-04-24 · 3 obs

○ 2017-05-31 07:57:16
● 2026-02-19 14:05:40
● 2026-04-24 17:52:16

●A185.104.29.1062026-02-19 → 2026-04-24 · 3 obs

○ 2017-05-31 07:57:16
● 2026-02-19 14:05:40
● 2026-04-24 17:52:16

○A217.114.101.2262015-08-18 → 2017-05-31 · 5 obs

○ 2008-03-19 17:58:56
● 2015-08-18 04:41:30
● 2017-05-31 07:57:16
○ 2026-02-19 14:05:40
○ 2026-04-24 17:52:16

○A217.114.97.2452008-03-19 → 2008-03-19 · 3 obs

● 2008-03-19 17:58:56
○ 2015-08-18 04:41:30
○ 2026-04-24 17:52:16

●A2a06:2ec0:1::1352026-02-19 → 2026-04-24 · 3 obs

○ 2017-05-31 07:57:16
● 2026-02-19 14:05:40
● 2026-04-24 17:52:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
calcmastersoftware.com	ns.zxcs.nl, ns.zxcs.be, ns.zxcs.eu	-

✅ Authoritative Response

Server:46.101.179.64

NS records: ns.zxcs.nl, ns.zxcs.be, ns.zxcs.eu

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for calcmastersoftware.com (unsigned zone)

⏱️ Timing

Total: 1162ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`185.104.29.106`
AAAA	1	`2a06:2ec0:1::135`
NS	3	`ns.zxcs.eu, ns.zxcs.be...`
MX	1	`spamrelay.zxcs.nl (pri: 10)`
TXT	1	`v=spf1 a mx ip4:185.104.29.106 ip6:2a06:`
SOA	1	`ns.zxcs.nl hostmaster.calcmastersoftware`

Analysis

IP Addresses

calcmastersoftware.com resolves to two IP numbers: 2a06:2ec0:1::135 and 185.104.29.106.

Other host names, for instance mail.vanknippenberg-consultancy.com, drf-it.eu, abouttime.nl, pabohaarlem.nl and boomgaardbouw.nl share IP numbers with calcmastersoftware.com.

Name Servers

calcmastersoftware.com is delegated to three name servers: ns.zxcs.be, ns.zxcs.eu and ns.zxcs.nl.

calcmastersoftware.com partially shares name servers with other domains; examples include verloskundigenpraktijksittard.nl, christiaankoppelaar.nl, hotelboeken.eu, beldub.be and revtor.be.

These name servers are commonly used with ns1.zxcs.nl, ns2.zxcs.nl and ns3.zxcs.nl.

Host names with two IP numbers:

ns.zxcs.be points to 2a03:b0c0:3:d0::116:2001 and 46.101.179.64.

ns.zxcs.eu points to 2a03:b0c0:2:d0::57:1001 and 178.62.208.8.

ns.zxcs.nl points to 2a06:2ec0:1::10 and 185.104.28.19.

Mail Servers

calcmastersoftware.com is handled by a single mail server, spamrelay.zxcs.nl.

calcmastersoftware.com has the same mail server setup as other domains, including travelingo.nl, 13-225tyres.com, thecontentmap.nl, frankbolink.com and gastouderadministratie.nl.

Some mail servers are shared between calcmastersoftware.com and other domains, for example zavor.nl.

Host spamrelay.zxcs.nl resolves to two IPs: 2a06:2ec0:1::ffec and 185.104.28.12.

calcmastersoftware.com - robtex.com