`checkrecipients.com`

DNSSEC	⚠️ Not signed
A	3.33.130.190^{🇺🇸 Amazon3.33.128.0/20}
		PTR	`a2aa9ff50de748dbe.awsglobalaccelerator.com`
A	15.197.148.33^{🇺🇸 Amazon15.197.144.0/20}
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`
MX	`smtp.secureserver.net` ⭐
		A	216.69.141.71^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp01-v01.prod.phx3.secureserver.net`
		A	216.69.141.84^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp02-v01.prod.phx3.secureserver.net`
		A	216.69.141.113^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp03-v01.prod.phx3.secureserver.net`
MX	`mailstore1.secureserver.net`⁽¹⁰⁾
		A	216.69.141.78^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp01-v02.prod.phx3.secureserver.net`
		A	216.69.141.114^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp03-v02.prod.phx3.secureserver.net`
		A	216.69.141.162^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp02-v02.prod.phx3.secureserver.net`
SOA	`ns1.proofpoint.com`ops@proofpoint.com 2025-04-04 #10

`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=1774792432

Same first word

checkrecipients.net

checkrecipients.com

checkrecipients.co.uk

checkrecipients.email

checkrecipients.co

checkrecipients.info

DNS History

11 records (10 active, 1 former)

●NSns1.proofpoint.com2026-03-27 → 2026-03-29 · 2 obs

● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●NSns3.proofpoint.com2026-03-27 → 2026-03-29 · 2 obs

● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●NSpdns99.ultradns.biz2026-03-27 → 2026-03-29 · 2 obs

● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●NSpdns99.ultradns.com2026-03-27 → 2026-03-29 · 2 obs

● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●NSpdns99.ultradns.net2026-03-27 → 2026-03-29 · 2 obs

● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●NSpdns99.ultradns.org2026-03-27 → 2026-03-29 · 2 obs

● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●MXmailstore1.secureserver.net2026-03-27 → 2026-03-29 · 2 obs

● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●MXsmtp.secureserver.net2026-03-27 → 2026-03-29 · 2 obs

● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●A15.197.148.332026-03-27 → 2026-03-29 · 3 obs

○ 2017-05-10 03:15:00
● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

●A3.33.130.1902026-03-27 → 2026-03-29 · 3 obs

○ 2017-05-10 03:15:00
● 2026-03-27 22:54:46
● 2026-03-29 14:04:54

○A50.63.202.602017-05-10 → 2017-05-10 · 3 obs

● 2017-05-10 03:15:00
○ 2026-03-27 22:54:46
○ 2026-03-29 14:04:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
checkrecipients.com	ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.net, pdns99.ultradns.com...	6 records

✅ Authoritative Response

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for checkrecipients.com (unsigned zone)

⏱️ Timing

Total: 153ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`3.33.130.190, 15.197.148.33`
NS	6	`ns1.proofpoint.com, ns3.proofpoint.com...`
MX	2	`smtp.secureserver.net (pri: 0), mailstore1.secureserver.net (pri: 10)`
SOA	1	`ns1.proofpoint.com ops.proofpoint.com`

📌 Glue Records Collected

Total: 6

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

Analysis

IP Addresses

checkrecipients.com points to two IP numbers: 3.33.130.190 and 15.197.148.33.

Other host names, for instance cdorestaurant.com, njtechsummit.com, rnr-holdings.com, donormotor.com and jagop.com share IP numbers with checkrecipients.com.

Name Servers

checkrecipients.com is delegated to six name servers: pdns99.ultradns.biz, ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.com, pdns99.ultradns.net and pdns99.ultradns.org.

checkrecipients.com at least partially shares its name servers with other domains, for instance proofpoint.im, 423a.com, smartbill.com, wheretoshoot.org and 0365.help.