sendmail21.com - dns.ninja

`sendmail21.com`

DNSSEC	⚠️ Not signed
NS	`ns1.proofpoint.com` ⭐
		A	2620:100:9000:1::d0^{🇺🇸 Proofpoint2620:100:9000::/47 Inc.}
			PTR	`ns1.proofpoint.com`
		A	208.84.67.208^{🇺🇸 Proofpoint208.84.67.0/24 Inc.}
			PTR	`ns1-at1.proofpoint.com`
			PTR	`ns1.proofpoint.com`
			PTR	`ns5.proofpoint.com`
NS	`ns3.proofpoint.com`
		A	2620:100:9004:1::d0^{🇺🇸 Proofpoint2620:100:9004::/47 Inc.}
			PTR	`ns3.proofpoint.com`
		A	208.84.66.208^{🇺🇸 Proofpoint208.84.66.0/24 Inc.}
			PTR	`ns1-sc4.proofpoint.com`
			PTR	`ns2.proofpoint.com`
			PTR	`ns3.proofpoint.com`
			PTR	`ns4.proofpoint.com`
NS	`pdns99.ultradns.biz`
		A	2610:a1:1015::87^{🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar}
			PTR	`pdns99.ultradns.biz`
		A	156.154.66.99^{🇺🇸 MAINT-ID-12008156.154.66.0/24 Neustar}
			PTR	`pdns99.ultradns.biz`
NS	`pdns99.ultradns.com`
		A	2001:502:f3ff::87^{🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar}
			PTR	`pdns99.ultradns.com`
		A	156.154.64.99^{🇺🇸 MAINT-ID-12008156.154.64.0/24 Neustar}
			PTR	`pdns99.ultradns.com`
NS	`pdns99.ultradns.net`
		A	2610:a1:1014::87^{🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar}
			PTR	`pdns99.ultradns.net`
		A	156.154.65.99^{🇺🇸 MAINT-ID-12008156.154.65.0/24 Neustar}
			PTR	`pdns99.ultradns.net`
NS	`pdns99.ultradns.org`
		A	2001:502:4612::87^{🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar}
			PTR	`pdns99.ultradns.org`
		A	156.154.67.99^{🇺🇸 MAINT-ID-12008156.154.67.0/24 Neustar}
			PTR	`pdns99.ultradns.org`
TXT	`v=spf1 -all`
SOA	`ns1.proofpoint.com`ops@proofpoint.com 2017-03-02 #13

	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=1782454170

sendmail21.com

6 records (6 active, 0 former)

●NSns1.proofpoint.com2015-05-20 → 2026-06-26 · 2 obs

● 2015-05-20 17:17:48
● 2026-06-26 06:39:16

●NSns3.proofpoint.com2015-05-20 → 2026-06-26 · 2 obs

● 2015-05-20 17:17:48
● 2026-06-26 06:39:16

●NSpdns99.ultradns.biz2015-12-15 → 2026-06-26 · 3 obs

○ 2015-05-20 17:17:48
● 2015-12-15 01:26:26
● 2026-06-26 06:39:16

●NSpdns99.ultradns.com2015-12-15 → 2026-06-26 · 3 obs

○ 2015-05-20 17:17:48
● 2015-12-15 01:26:26
● 2026-06-26 06:39:16

●NSpdns99.ultradns.net2015-12-15 → 2026-06-26 · 3 obs

○ 2015-05-20 17:17:48
● 2015-12-15 01:26:26
● 2026-06-26 06:39:16

●NSpdns99.ultradns.org2015-12-15 → 2026-06-26 · 3 obs

○ 2015-05-20 17:17:48
● 2015-12-15 01:26:26
● 2026-06-26 06:39:16

Zone	Nameservers	Glue
com	g.gtld-servers.net, i.gtld-servers.net, b.gtld-servers.net, k.gtld-servers.net...	-
sendmail21.com	ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.net, pdns99.ultradns.com...	6 records

Server:156.154.66.99

NS records: ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.net, pdns99.ultradns.com, pdns99.ultradns.biz, pdns99.ultradns.org

⚠️ Insecure (no DNSSEC)

No DS record for sendmail21.com (unsigned zone)

Total: 599ms | Queries: -

Type	Count	Sample Data
NS	6	`ns1.proofpoint.com, ns3.proofpoint.com...`
TXT	1	`v=spf1 -all`
SOA	1	`ns1.proofpoint.com ops.proofpoint.com`

Total: 6

Out-of-bailiwick: 6 (ns1.proofpoint.com, ns1.proofpoint.com, ns3.proofpoint.com...)

sendmail21.com is served by 6 authoritative name servers — among them pdns99.ultradns.biz, ns1.proofpoint.com, ns3.proofpoint.com and 3 others.

At least some of sendmail21.com's name servers are shared with other domains, for example aminonitrile.com, 134.163.148.in-addr.arpa, tempoline.com and two more.

These name servers are often deployed together with the name servers pdns99.ultradns.net, pdns99.ultradns.com, pdns99.ultradns.org and infoblox-sc4.ppops.net.

Host names that have two IP addresses: