`grefenstette.com`

DNSSEC	⚠️ Not signed
A	37.49.151.79^{🇮🇷 M-137.49.151.0/24}
NS	`ns-556.awsdns-05.net` ⭐ ⚠️ Not in parent delegation
		A	2600:9000:5302:2c00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-556.awsdns-05.net`
		A	205.251.194.44^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-556.awsdns-05.net`
NS	`ns-1460.awsdns-54.org` ⚠️ Not in parent delegation
		A	2600:9000:5305:b400::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1460.awsdns-54.org`
		A	205.251.197.180^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1460.awsdns-54.org`
NS	`ns-750.awsdns-29.net` ⚠️ Not in parent delegation
		A	2600:9000:5302:ee00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-750.awsdns-29.net`
		A	205.251.194.238^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-750.awsdns-29.net`
NS	`ns-812.awsdns-37.net` ⚠️ Not in parent delegation
		A	2600:9000:5303:2c00::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-812.awsdns-37.net`
		A	205.251.195.44^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-812.awsdns-37.net`
NS	`ns1.grefenstette.com` ⚠️ Not in zone NS records
NS	`ns2.grefenstette.com` ⚠️ Not in zone NS records
MX	`mx.grefenstette.com` ⭐
		A	37.49.151.79^{🇮🇷 M-137.49.151.0/24}
TXT	`v=spf1 ip4:162.218.244.245 ip4:162.218.244.254 ip4:162.218.244.184 ip4:162.21...`
SOA	`ns-556.awsdns-05.net`awsdns-hostmaster@amazon.com serial=1

`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=1778404621

Subdomains

mx.grefenstette.com

ns1.grefenstette.com

ns2.grefenstette.com

Same first word

grefenstette.com

DNS History

15 records (8 active, 7 former)

●NSns-1460.awsdns-54.org2026-03-23 → 2026-05-10 · 3 obs

○ 2016-12-30 09:48:32
● 2026-03-23 20:52:54
● 2026-05-10 09:21:54

●NSns-556.awsdns-05.net2026-03-23 → 2026-05-10 · 3 obs

○ 2016-12-30 09:48:32
● 2026-03-23 20:52:54
● 2026-05-10 09:21:54

●NSns-750.awsdns-29.net2026-03-23 → 2026-05-10 · 3 obs

○ 2016-12-30 09:48:32
● 2026-03-23 20:52:54
● 2026-05-10 09:21:54

●NSns-812.awsdns-37.net2026-03-23 → 2026-05-10 · 3 obs

○ 2016-12-30 09:48:32
● 2026-03-23 20:52:54
● 2026-05-10 09:21:54

○NSns1.city-net.com2007-11-04 → 2016-12-30 · 4 obs

● 2007-11-04 19:29:32
● 2016-12-30 09:48:32
○ 2026-03-23 20:52:54
○ 2026-05-10 09:21:54

●NSns1.grefenstette.com2026-03-23 → 2026-05-10 · 3 obs

○ 2016-12-30 09:48:32
● 2026-03-23 20:52:54
● 2026-05-10 09:21:54

○NSns2.city-net.com2007-11-04 → 2016-12-30 · 4 obs

● 2007-11-04 19:29:32
● 2016-12-30 09:48:32
○ 2026-03-23 20:52:54
○ 2026-05-10 09:21:54

●NSns2.grefenstette.com2026-03-23 → 2026-05-10 · 3 obs

○ 2016-12-30 09:48:32
● 2026-03-23 20:52:54
● 2026-05-10 09:21:54

○MXmail.city-net.com2007-11-04 → 2007-11-04 · 3 obs

● 2007-11-04 19:29:32
○ 2015-06-09 00:07:42
○ 2026-05-10 09:21:54

○MXmail.realprodata.com2015-06-09 → 2016-12-30 · 5 obs

○ 2007-11-04 19:29:32
● 2015-06-09 00:07:42
● 2016-12-30 09:48:32
○ 2026-03-23 20:52:54
○ 2026-05-10 09:21:54

●MXmx.grefenstette.com2026-03-23 → 2026-05-10 · 3 obs

○ 2016-12-30 09:48:32
● 2026-03-23 20:52:54
● 2026-05-10 09:21:54

○MXracerx.city-net.com2007-11-04 → 2007-11-04 · 3 obs

● 2007-11-04 19:29:32
○ 2015-06-09 00:07:42
○ 2026-05-10 09:21:54

○A198.144.35.552007-11-04 → 2007-11-04 · 3 obs

● 2007-11-04 19:29:32
○ 2015-06-09 00:07:42
○ 2026-05-10 09:21:54

○A198.144.36.2022015-06-09 → 2016-12-30 · 5 obs

○ 2007-11-04 19:29:32
● 2015-06-09 00:07:42
● 2016-12-30 09:48:32
○ 2026-03-23 20:52:54
○ 2026-05-10 09:21:54

●A37.49.151.792026-03-23 → 2026-05-10 · 3 obs

○ 2016-12-30 09:48:32
● 2026-03-23 20:52:54
● 2026-05-10 09:21:54

🔍 DNS Trace

Analysis

Hierarchy

grefenstette.com is a parent of mx.grefenstette.com, ns1.grefenstette.com and ns2.grefenstette.com.

IP Addresses

grefenstette.com points to a single IP: 37.49.151.79.

Other host names, such as mx.grefenstette.com, share IP numbers with grefenstette.com.

Name Servers

grefenstette.com is delegated to six name servers: ns1.grefenstette.com, ns2.grefenstette.com, ns-556.awsdns-05.net, ns-750.awsdns-29.net, ns-812.awsdns-37.net and ns-1460.awsdns-54.org.

grefenstette.com partially shares name servers with other domains; examples include mondolibri.it, dixieflowershop.store, amwal.com.eg, flockwiseinsights.com and d2j5yy0o85y573.cloudfront.net.

These name servers are commonly used with ns-425.awsdns-53.com, ns-530.awsdns-02.net and ns-1862.awsdns-40.co.uk.

Host names with two IPs:

ns-556.awsdns-05.net points to 2600:9000:5302:2c00::1 and 205.251.194.44

ns-750.awsdns-29.net points to 2600:9000:5302:ee00::1 and 205.251.194.238

ns-812.awsdns-37.net points to 2600:9000:5303:2c00::1 and 205.251.195.44

ns-1460.awsdns-54.org points to 2600:9000:5305:b400::1 and 205.251.197.180

Mail Servers

grefenstette.com is handled by a single mail server, mx.grefenstette.com.

mx.grefenstette.com points to a single IP: 37.49.151.79.

grefenstette.com - robtex.com