`attendr.app`

DNSSEC	⚠️ Not signed
A	18.155.21.14^{🇺🇸 Amazon18.155.16.0/21}
		PTR	`server-18-155-21-14.gru3.r.cloudfront.net`
A	18.155.21.66^{🇺🇸 Amazon18.155.16.0/21}
A	18.155.21.88^{🇺🇸 Amazon18.155.16.0/21}
A	18.155.21.110^{🇺🇸 Amazon18.155.16.0/21}
NS	`ns-1988.awsdns-56.co.uk` ⭐
		A	2600:9000:5307:c400::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1988.awsdns-56.co.uk`
		A	205.251.199.196^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1988.awsdns-56.co.uk`
NS	`ns-1172.awsdns-18.org`
		A	2600:9000:5304:9400::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1172.awsdns-18.org`
		A	205.251.196.148^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1172.awsdns-18.org`
NS	`ns-251.awsdns-31.com`
		A	2600:9000:5300:fb00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-251.awsdns-31.com`
		A	205.251.192.251^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-251.awsdns-31.com`
NS	`ns-610.awsdns-12.net`
		A	2600:9000:5302:6200::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-610.awsdns-12.net`
		A	205.251.194.98^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-610.awsdns-12.net`
MX	`mx2.zoho.com` ⭐
		A	136.143.183.44^{🇺🇸 ZohoAS136.143.182.0/23 Zoho}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx3.zoho.com`⁽²⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx.zoho.com`⁽⁵⁰⁾
		A	136.143.183.44^{🇺🇸 ZohoAS136.143.182.0/23 Zoho}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
TXT	`v=spf1 include:zohomail.com ~all`
TXT	`zoho-verification=zb06552855.zmverify.zoho.com`
SOA	`ns-1988.awsdns-56.co.uk`awsdns-hostmaster@amazon.com serial=1

`app`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=101427

🔒 HSTS Preload (+subdomains)

Same first word

attendr.com

attendr.app

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DNS History

15 records (11 active, 4 former)

●NSns-1172.awsdns-18.org2026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●NSns-1988.awsdns-56.co.uk2026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●NSns-251.awsdns-31.com2026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●NSns-610.awsdns-12.net2026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●MXmx.zoho.com2026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●MXmx2.zoho.com2026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●MXmx3.zoho.com2026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
● 2026-04-13 22:47:24

○A108.139.119.1262026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
○ 2026-04-13 22:47:24

○A108.139.119.1292026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
○ 2026-04-13 22:47:24

○A108.139.119.552026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
○ 2026-04-13 22:47:24

○A108.139.119.972026-04-13 → 2026-04-13 · 2 obs

● 2026-04-13 07:48:20
○ 2026-04-13 22:47:24

●A18.155.21.1102026-04-13 → 2026-04-13 · 2 obs

○ 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●A18.155.21.142026-04-13 → 2026-04-13 · 2 obs

○ 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●A18.155.21.662026-04-13 → 2026-04-13 · 2 obs

○ 2026-04-13 07:48:20
● 2026-04-13 22:47:24

●A18.155.21.882026-04-13 → 2026-04-13 · 2 obs

○ 2026-04-13 07:48:20
● 2026-04-13 22:47:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld2.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com...	10 records
attendr.app	ns-610.awsdns-12.net, ns-1988.awsdns-56.co.uk, ns-251.awsdns-31.com, ns-1172.awsdns-18.org	-

✅ Authoritative Response

Server:205.251.196.148

NS records: ns-610.awsdns-12.net, ns-1988.awsdns-56.co.uk, ns-251.awsdns-31.com, ns-1172.awsdns-18.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for attendr.app (unsigned zone)

⏱️ Timing

Total: 574ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`18.155.21.14, 18.155.21.88...`
NS	4	`ns-1172.awsdns-18.org, ns-1988.awsdns-56.co.uk...`
MX	3	`mx.zoho.com (pri: 10), mx2.zoho.com (pri: 20)...`
TXT	2	`v=spf1 include:zohomail.com ~all, zoho-verification=zb06552855.zmverify.zo`
SOA	1	`ns-1988.awsdns-56.co.uk awsdns-hostmaste`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (ns-tld2.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...)

Analysis

IP Addresses

attendr.app maps to four IP numbers: 18.155.21.14, 18.155.21.66, 18.155.21.88 and 18.155.21.110.

Other host names, for instance wtcg.doxy.me, join.corelogic.com.au, www.californiastudentloans.org, www.muratec.jp and www.cats.org.hk share IP numbers with attendr.app.

Name Servers

attendr.app is delegated to four name servers: ns-251.awsdns-31.com, ns-610.awsdns-12.net, ns-1172.awsdns-18.org and ns-1988.awsdns-56.co.uk.

attendr.app at least partially shares name servers with other domains such as hotelchocolat.vc, marsupialmusic.net, mi-testw03.fr, flybuys.org and imazins.com.

Host names with two IP numbers:

ns-251.awsdns-31.com points to 2600:9000:5300:fb00::1 and 205.251.192.251

ns-610.awsdns-12.net points to 2600:9000:5302:6200::1 and 205.251.194.98

ns-1172.awsdns-18.org points to 2600:9000:5304:9400::1 and 205.251.196.148

ns-1988.awsdns-56.co.uk points to 2600:9000:5307:c400::1 and 205.251.199.196

Mail Servers

attendr.app is handled by three mail servers: mx2.zoho.com, mx3.zoho.com and mx.zoho.com.

attendr.app shares mail servers with other domains at least in part, for instance bitwan.space, fit.ae, midmo.us, rock-nroll.com and mariobekes.com.au.