circleback.com - dns.ninja

`circleback.com`

DNSSEC	⚠️ Not signed
A	141.193.213.10^{🇺🇸 CLOUDFLARESPECTRUM141.193.213.0/24 WPEngine, Inc. 504 Lavaca Street, 1000, Austin, TX 78701, US}
A	141.193.213.11^{🇺🇸 CLOUDFLARESPECTRUM141.193.213.0/24 WPEngine, Inc. 504 Lavaca Street, 1000, Austin, TX 78701, US}
NS	`ns-850.awsdns-42.net` ⭐
		A	2600:9000:5303:5200::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-850.awsdns-42.net`
		A	205.251.195.82^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-850.awsdns-42.net`
NS	`ns-1531.awsdns-63.org`
		A	2600:9000:5305:fb00::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1531.awsdns-63.org`
		A	205.251.197.251^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1531.awsdns-63.org`
NS	`ns-1857.awsdns-40.co.uk`
		A	2600:9000:5307:4100::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1857.awsdns-40.co.uk`
		A	205.251.199.65^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1857.awsdns-40.co.uk`
NS	`ns-61.awsdns-07.com`
		A	2600:9000:5300:3d00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-61.awsdns-07.com`
		A	205.251.192.61^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-61.awsdns-07.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c07::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bc-in-f26.1e100.net`
		A	142.251.16.27^{🇺🇸 Google142.251.16.0/24}
			PTR	`bl-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`aspmx3.googlemail.com`⁽¹⁰⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
TXT	`google-site-verification=4bT0HgEbsbjtgiePpkC9ZWaeQRfx7XU_UShL7JahFqY`
TXT	`google-site-verification=NcL3kH17YJk51ZVI4F7nixNxJYjY9_FO4De90iMsFzo`
TXT	`google-site-verification=VY-V-i_2xnl0R0hLCiP_3dehBfVzVzmq6p6hWSF8Bng`
TXT	`google-site-verification=luW33Ooukrp8ANGB638NBesxGOclNl11Z7RtPUC34mA`
TXT	`google-site-verification=mNpxB_JxI2UGf4l2gcXlRyJ6clow6b3HX1qJZu27ywg`
TXT	`google-site-verification=r90W1jwLbnjY_1VfbbvpA2kN4khK4nyQ5xTwkWvs0No`
TXT	`v=spf1 include:_spf.google.com include:mailgun.org include:mktomail.com inclu...`
TXT	`v=verifydomain MS=8327766`
SOA	`ns-850.awsdns-42.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=1784900942

WOT: SAFE (100/100)
📈 Tranco rank: #728,111

Subdomains

sync.circleback.com

s3.circleback.com

api.circleback.com

qa.circleback.com

www.circleback.com

abmail.circleback.com

Same first word

circleback.net

circleback.us

circleback.ai

circleback.com

DNS History

18 records (11 active, 7 former)

●NSns-1531.awsdns-63.org2017-02-11 → 2026-07-24 · 3 obs

○ 2016-06-28 05:40:52
● 2017-02-11 10:43:46
● 2026-07-24 14:02:28

●NSns-1857.awsdns-40.co.uk2017-02-11 → 2026-07-24 · 3 obs

○ 2016-06-28 05:40:52
● 2017-02-11 10:43:46
● 2026-07-24 14:02:28

●NSns-61.awsdns-07.com2017-02-11 → 2026-07-24 · 3 obs

○ 2016-06-28 05:40:52
● 2017-02-11 10:43:46
● 2026-07-24 14:02:28

●NSns-850.awsdns-42.net2017-02-11 → 2026-07-24 · 3 obs

○ 2016-06-28 05:40:52
● 2017-02-11 10:43:46
● 2026-07-24 14:02:28

○NSpdns05.domaincontrol.com2015-08-21 → 2016-06-28 · 4 obs

● 2015-08-21 23:06:28
● 2016-06-28 05:40:52
○ 2017-02-11 10:43:46
○ 2026-07-24 14:02:28

○NSpdns06.domaincontrol.com2015-08-21 → 2016-06-28 · 4 obs

● 2015-08-21 23:06:28
● 2016-06-28 05:40:52
○ 2017-02-11 10:43:46
○ 2026-07-24 14:02:28

●MXalt1.aspmx.l.google.com2015-08-21 → 2026-07-24 · 2 obs

● 2015-08-21 23:06:28
● 2026-07-24 14:02:28

●MXalt2.aspmx.l.google.com2015-08-21 → 2026-07-24 · 2 obs

● 2015-08-21 23:06:28
● 2026-07-24 14:02:28

●MXaspmx.l.google.com2015-08-21 → 2026-07-24 · 2 obs

● 2015-08-21 23:06:28
● 2026-07-24 14:02:28

●MXaspmx2.googlemail.com2015-08-21 → 2026-07-24 · 2 obs

● 2015-08-21 23:06:28
● 2026-07-24 14:02:28

●MXaspmx3.googlemail.com2015-08-21 → 2026-07-24 · 2 obs

● 2015-08-21 23:06:28
● 2026-07-24 14:02:28

○A107.23.139.412017-02-11 → 2017-02-11 · 4 obs

○ 2016-06-28 05:40:52
● 2017-02-11 10:43:46
○ 2026-02-15 16:22:52
○ 2026-07-24 14:02:28

●A141.193.213.102026-02-15 → 2026-07-24 · 3 obs

○ 2017-02-11 10:43:46
● 2026-02-15 16:22:52
● 2026-07-24 14:02:28

●A141.193.213.112026-02-15 → 2026-07-24 · 3 obs

○ 2017-02-11 10:43:46
● 2026-02-15 16:22:52
● 2026-07-24 14:02:28

○A184.168.221.112015-08-21 → 2015-08-21 · 3 obs

● 2015-08-21 23:06:28
○ 2015-09-27 03:57:20
○ 2026-07-24 14:02:28

○A184.168.221.22015-09-27 → 2016-02-23 · 5 obs

○ 2015-08-21 23:06:28
● 2015-09-27 03:57:20
● 2016-02-23 21:28:20
○ 2016-06-28 05:40:52
○ 2026-07-24 14:02:28

○A50.63.202.162016-06-28 → 2016-06-28 · 4 obs

○ 2016-02-23 21:28:20
● 2016-06-28 05:40:52
○ 2017-02-11 10:43:46
○ 2026-07-24 14:02:28

○A54.88.247.372017-02-11 → 2017-02-11 · 4 obs

○ 2016-06-28 05:40:52
● 2017-02-11 10:43:46
○ 2026-02-15 16:22:52
○ 2026-07-24 14:02:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
circleback.com	ns-61.awsdns-07.com, ns-850.awsdns-42.net, ns-1857.awsdns-40.co.uk, ns-1531.awsdns-63.org	2 records

✅ Authoritative Response

Server:205.251.195.82

NS records: ns-61.awsdns-07.com, ns-850.awsdns-42.net, ns-1857.awsdns-40.co.uk, ns-1531.awsdns-63.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for circleback.com (unsigned zone)

⏱️ Timing

Total: 2770ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`141.193.213.11, 141.193.213.10`
NS	4	`ns-1531.awsdns-63.org, ns-1857.awsdns-40.co.uk...`
MX	5	`aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...`
TXT	8	`google-site-verification=4bT0HgEbsbjtgie, google-site-verification=NcL3kH17YJk51ZV...`
SOA	1	`ns-850.awsdns-42.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-61.awsdns-07.com, ns-61.awsdns-07.com)

Analysis

Hierarchy

The host names sync.circleback.com, s3.circleback.com, api.circleback.com, qa.circleback.com and www.circleback.com — among a few others — fall under the parent domain circleback.com.

IP Addresses

circleback.com has two IP addresses: 141.193.213.10 and 141.193.213.11

Among the host names that share IP numbers with circleback.com are instudio.uk, sdsynod.org, kidzcare.lk and two others.

Name Servers

The domain circleback.com is delegated to these four name servers: ns-61.awsdns-07.com, ns-850.awsdns-42.net, ns-1531.awsdns-63.org and ns-1857.awsdns-40.co.uk.

Four hostnames, each resolving to a pair of IP addresses: ns-61.awsdns-07.com directs to 205.251.192.61 and 2600:9000:5300:3d00::1; ns-850.awsdns-42.net directs to 205.251.195.82 and 2600:9000:5303:5200::1; ns-1531.awsdns-63.org directs to 205.251.197.251 and 2600:9000:5305:fb00::1; ns-1857.awsdns-40.co.uk directs to 205.251.199.65 and 2600:9000:5307:4100::1.

Mail Servers

Five mail servers handle circleback.com: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.

circleback.com shares at least some of its mail servers with other domains — for example ns500754.ns500731.ns500731.ns500704.ns500705.ns500705.ns500688.ns500688.ns500671.ns500678.ns500688.ns500291.ns500291.ns500153.tenderladiesbz.com, ns500671.ns500671.ns500731.ns500754.ns500671.ns500688.ns500649.ns500291.ns500678.ns500291.ns500666.tenderladiesbz.com, ns500731.ns500754.ns500671.ns500742.ns500742.ns500704.ns500731.ns500705.ns500688.ns500291.ns500649.ns500666.ns500653.ns500153.tenderladiesbz.com and two more.

It is common to find these mail servers paired with mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 more.

Hosts with two IP numbers each:

aspmx2.googlemail.com maps to two IP addresses — 108.177.123.27 and 2800:3f0:4003:c0f::1b.

aspmx3.googlemail.com maps to two IP addresses — 172.253.116.27 and 2a00:1450:400b:c02::1a.

aspmx.l.google.com maps to two IP addresses — 142.251.16.27 and 2607:f8b0:4004:c07::1a.

alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com maps to two IP addresses — 172.253.116.27 and 2a00:1450:400b:c02::1b.

These two host names — aspmx2.googlemail.com and alt1.aspmx.l.google.com — each point to 2800:3f0:4003:c0f::1b IP addresses.

These two host names — aspmx3.googlemail.com and alt2.aspmx.l.google.com — each point to 172.253.116.27 IP addresses.