`challengersrt.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:9ca0^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:80f^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.8.15^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.156.160^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`charles.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b53^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`charles.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c153^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`charles.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2153^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`charles.ns.cloudflare.com`
		A	108.162.193.83^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`charles.ns.cloudflare.com`
		A	172.64.33.83^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`charles.ns.cloudflare.com`
		A	173.245.59.83^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`charles.ns.cloudflare.com`
NS	`uma.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a92^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`uma.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c092^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`uma.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2092^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`uma.ns.cloudflare.com`
		A	108.162.192.146^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`uma.ns.cloudflare.com`
		A	172.64.32.146^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`uma.ns.cloudflare.com`
		A	173.245.58.146^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`uma.ns.cloudflare.com`
MX	`mxa.mailgun.org` ⭐
		A	34.160.13.42^{🇺🇸 Google34.160.0.0/16}
			PTR	`42.13.160.34.bc.googleusercontent.com`
MX	`mxb.mailgun.org` ⭐
		A	34.160.13.42^{🇺🇸 Google34.160.0.0/16}
			PTR	`42.13.160.34.bc.googleusercontent.com`
TXT	`v=spf1 include:mailgun.org -all`
TXT	`v=spf1 ip4:108.61.35.18 -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.8.15, 172.67.156.160
		IPv6	2606:4700:3031::ac43:9ca0, 2606:4700:3034::6815:80f
SOA	`charles.ns.cloudflare.com`dns@cloudflare.com serial=2399457198

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1773551953

Same first word

challengersrt.org

DNS History

13 records (8 active, 5 former)

●NScharles.ns.cloudflare.com2026-03-03 → 2026-03-23 · 3 obs

○ 2017-10-17 02:14:56
● 2026-03-03 06:08:30
● 2026-03-23 11:03:44

○NSpdns05.domaincontrol.com2015-07-06 → 2017-10-17 · 4 obs

● 2015-07-06 17:43:38
● 2017-10-17 02:14:56
○ 2026-03-03 06:08:30
○ 2026-03-23 11:03:44

○NSpdns06.domaincontrol.com2015-07-06 → 2017-10-17 · 4 obs

● 2015-07-06 17:43:38
● 2017-10-17 02:14:56
○ 2026-03-03 06:08:30
○ 2026-03-23 11:03:44

●NSuma.ns.cloudflare.com2026-03-03 → 2026-03-23 · 3 obs

○ 2017-10-17 02:14:56
● 2026-03-03 06:08:30
● 2026-03-23 11:03:44

○MXmailstore1.secureserver.net2015-07-06 → 2017-10-17 · 4 obs

● 2015-07-06 17:43:38
● 2017-10-17 02:14:56
○ 2026-03-03 06:08:30
○ 2026-03-23 11:03:44

●MXmxa.mailgun.org2026-03-03 → 2026-03-23 · 3 obs

○ 2017-10-17 02:14:56
● 2026-03-03 06:08:30
● 2026-03-23 11:03:44

●MXmxb.mailgun.org2026-03-03 → 2026-03-23 · 3 obs

○ 2017-10-17 02:14:56
● 2026-03-03 06:08:30
● 2026-03-23 11:03:44

○MXsmtp.secureserver.net2015-07-06 → 2017-10-17 · 4 obs

● 2015-07-06 17:43:38
● 2017-10-17 02:14:56
○ 2026-03-03 06:08:30
○ 2026-03-23 11:03:44

●A104.21.8.152026-03-03 → 2026-03-23 · 3 obs

○ 2017-10-17 02:14:56
● 2026-03-03 06:08:30
● 2026-03-23 11:03:44

●A172.67.156.1602026-03-03 → 2026-03-23 · 3 obs

○ 2017-10-17 02:14:56
● 2026-03-03 06:08:30
● 2026-03-23 11:03:44

○A184.168.221.382015-07-06 → 2017-10-17 · 4 obs

● 2015-07-06 17:43:38
● 2017-10-17 02:14:56
○ 2026-03-03 06:08:30
○ 2026-03-23 11:03:44

●A2606:4700:3031::ac43:9ca02026-03-03 → 2026-03-23 · 3 obs

○ 2017-10-17 02:14:56
● 2026-03-03 06:08:30
● 2026-03-23 11:03:44

●A2606:4700:3034::6815:80f2026-03-03 → 2026-03-23 · 3 obs

○ 2017-10-17 02:14:56
● 2026-03-03 06:08:30
● 2026-03-23 11:03:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, b0.org.afilias-nst.org, d0.org.afilias-nst.org	-
challengersrt.org	charles.ns.cloudflare.com, uma.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.146

NS records: charles.ns.cloudflare.com, uma.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for challengersrt.org (unsigned zone)

⏱️ Timing

Total: 574ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.8.15, 172.67.156.160`
AAAA	2	`2606:4700:3031::ac43:9ca0, 2606:4700:3034::6815:80f`
NS	2	`charles.ns.cloudflare.com, uma.ns.cloudflare.com`
MX	2	`mxa.mailgun.org (pri: 10), mxb.mailgun.org (pri: 10)`
TXT	2	`v=spf1 include:mailgun.org -all, v=spf1 ip4:108.61.35.18 -all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`charles.ns.cloudflare.com dns.cloudflare`

Analysis

IP Addresses

challengersrt.org maps to four IP numbers: 2606:4700:3031::ac43:9ca0, 2606:4700:3034::6815:80f, 104.21.8.15 and 172.67.156.160.

Other host names, for instance ennequadro.com, consulfrance-lisbonne.org, archimedean.org, kallkwik.co.uk and isallaboutmath.com share IP numbers with challengersrt.org.

Name Servers

Two name servers charles.ns.cloudflare.com and uma.ns.cloudflare.com are delegated to challengersrt.org.

challengersrt.org uses the same name server configuration as other domains, such as szkoleniaiwarsztaty.pl, bmwm2.org, invenio.mk, dwb.com.pl and koitech.pl.

challengersrt.org at least partially shares name servers with other domains such as onlypoint.com, laelitebet.com, scznzsm.com, completemarkets.me and jr.dk.

these name servers are commonly used with the name servers kim.ns.cloudflare.com.

Host names with six IP numbers: Host name charles.ns.cloudflare.com points to 2606:4700:58::adf5:3b53, 2803:f800:50::6ca2:c153, 2a06:98c1:50::ac40:2153, 108.162.193.83, 172.64.33.83 and 173.245.59.83; host name uma.ns.cloudflare.com points to 2606:4700:50::adf5:3a92, 2803:f800:50::6ca2:c092, 2a06:98c1:50::ac40:2092, 108.162.192.146, 172.64.32.146 and 173.245.58.146.

Mail Servers

Two mail servers handle challengersrt.org: mxa.mailgun.org and mxb.mailgun.org.

challengersrt.org shares the same mail server setup as other domains, including labelleroute.com, cronostone.com, abruzzomoliseheritagesociety.org, gervasio.ca and mule-air.com.

challengersrt.org shares mail servers with other domains at least in part, for instance mountainsfoundation.org, mangaarabia.com, airnheat.com, boxingshowtimes.com and syt.co.il.

Hostnames with one IP number:

mxa.mailgun.org points to 34.160.13.42

mxb.mailgun.org points to 34.160.13.42

Hostnames pointing to 34.160.13.42: mxa.mailgun.org, mxb.mailgun.org

challengersrt.org - robtex.com