tandem-exercise.com - robtex.com

tandem-exercise.com

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:a7f7🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::6815:525b🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.82.91Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.167.247🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSbrenna.ns.cloudflare.com ⭐
A2606:4700:50::a29f:26b0🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbrenna.ns.cloudflare.com
A2803:f800:50::6ca2:c2b0🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRbrenna.ns.cloudflare.com
A2a06:98c1:50::ac40:22b0🇺🇸 Cloudflare2a06:98c1:50::/45
PTRbrenna.ns.cloudflare.com
A108.162.194.176🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbrenna.ns.cloudflare.com
A162.159.38.176Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbrenna.ns.cloudflare.com
A172.64.34.176🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbrenna.ns.cloudflare.com
NSrustam.ns.cloudflare.com
A2606:4700:58::a29f:2c94🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrustam.ns.cloudflare.com
A2803:f800:50::6ca2:c394🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRrustam.ns.cloudflare.com
A2a06:98c1:50::ac40:2394🇺🇸 Cloudflare2a06:98c1:50::/45
PTRrustam.ns.cloudflare.com
A108.162.195.148🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrustam.ns.cloudflare.com
A162.159.44.148Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrustam.ns.cloudflare.com
A172.64.35.148🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrustam.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.82.91, 172.67.167.247
IPv6 hints2606:4700:3031::ac43:a7f7, 2606:4700:3035::6815:525b
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=103, name=cloudflare-ech.com
SOAbrenna.ns.cloudflare.comdns@cloudflare.com serial=2408871106

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1785091022
⚠️ On DNS blocklist: tif

Same first word

tandem-exercise.com

DNS History

8 records (6 active, 2 former)

NSbrenna.ns.cloudflare.comrustam.ns.cloudflare.comA104.21.82.91172.67.167.2472606:4700:3031::ac43:a7f72606:4700:3035::6815:525b2606:4700:3030::6815:525b2606:4700:3032::ac43:a7f7
●NSbrenna.ns.cloudflare.com2026-05-07 → 2026-07-26 · 2 obs
● 2026-05-07 01:04:12
● 2026-07-26 19:00:22
●NSrustam.ns.cloudflare.com2026-05-07 → 2026-07-26 · 2 obs
● 2026-05-07 01:04:12
● 2026-07-26 19:00:22
●A104.21.82.912026-05-07 → 2026-07-26 · 2 obs
● 2026-05-07 01:04:12
● 2026-07-26 19:00:22
●A172.67.167.2472026-05-07 → 2026-07-26 · 2 obs
● 2026-05-07 01:04:12
● 2026-07-26 19:00:22
○A2606:4700:3030::6815:525b2026-05-07 → 2026-06-14 · 4 obs
● 2026-05-07 01:04:12
● 2026-06-14 03:35:00
○ 2026-07-26 19:00:20
○ 2026-07-26 19:00:22
●A2606:4700:3031::ac43:a7f72026-07-26 → 2026-07-26 · 3 obs
○ 2026-06-14 03:35:00
● 2026-07-26 19:00:20
● 2026-07-26 19:00:22
○A2606:4700:3032::ac43:a7f72026-05-07 → 2026-06-14 · 4 obs
● 2026-05-07 01:04:12
● 2026-06-14 03:35:00
○ 2026-07-26 19:00:20
○ 2026-07-26 19:00:22
●A2606:4700:3035::6815:525b2026-07-26 → 2026-07-26 · 3 obs
○ 2026-06-14 03:35:00
● 2026-07-26 19:00:20
● 2026-07-26 19:00:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
tandem-exercise.combrenna.ns.cloudflare.com, rustam.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.195.148

NS records: brenna.ns.cloudflare.com, rustam.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 197ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.167.247, 104.21.82.91
AAAA22606:4700:3035::6815:525b, 2606:4700:3031::ac43:a7f7
NS2brenna.ns.cloudflare.com, rustam.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1brenna.ns.cloudflare.com dns.cloudflare.

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (brenna.ns.cloudflare.com, brenna.ns.cloudflare.com, brenna.ns.cloudflare.com...)

Analysis

IP Addresses

tandem-exercise.com resolves to four IP addresses: 104.21.82.91, 172.67.167.247, 2606:4700:3031::ac43:a7f7 and 2606:4700:3035::6815:525b.

scjdty.com, okistyle.shop, koreosity.nl and two other host names share IP numbers with tandem-exercise.com.

Name Servers

Two name servers handle the delegation for tandem-exercise.com: brenna.ns.cloudflare.com and rustam.ns.cloudflare.com.

tandem-exercise.com uses the same name servers as several other domains — among them leonli.com, jwor.org, butlercc.edu and two more.

tandem-exercise.com partially shares its NS delegation with several other domains, including moomshots.net, f89.bet, adventknows.com and two others.

These name servers regularly co-occur with the name servers nelci.ns.cloudflare.com, aaden.ns.cloudflare.com and aurora.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

brenna.ns.cloudflare.com resolves to 108.162.194.176, 162.159.38.176 and 172.64.34.176 among others, with 3 other IP addresses in total.

rustam.ns.cloudflare.com resolves to 108.162.195.148, 162.159.44.148 and 172.64.35.148 among others, with 3 other IP addresses in total.