flex-sys.us - dns.ninja

flex-sys.us

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:40c4🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:9b54🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.64.196Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.155.84🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSleland.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2c08🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRleland.ns.cloudflare.com
A2803:f800:50::6ca2:c308🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRleland.ns.cloudflare.com
A2a06:98c1:50::ac40:2308🇺🇸 Cloudflare2a06:98c1:50::/45
PTRleland.ns.cloudflare.com
A108.162.195.8🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRleland.ns.cloudflare.com
A162.159.44.8Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRleland.ns.cloudflare.com
A172.64.35.8🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRleland.ns.cloudflare.com
NSoaklyn.ns.cloudflare.com
A2606:4700:50::a29f:265a🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRoaklyn.ns.cloudflare.com
A2803:f800:50::6ca2:c25a🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRoaklyn.ns.cloudflare.com
A2a06:98c1:50::ac40:225a🇺🇸 Cloudflare2a06:98c1:50::/45
PTRoaklyn.ns.cloudflare.com
A108.162.194.90🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRoaklyn.ns.cloudflare.com
A162.159.38.90Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRoaklyn.ns.cloudflare.com
A172.64.34.90🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRoaklyn.ns.cloudflare.com
MXwitcher.mxrouting.net ⭐
A45.43.208.43🇺🇸 QUICKPACKET45.43.208.0/24 QuickPacket LLC
PTRwitcher.mxrouting.net
MXmail.flex-sys.us(10)
TXTgoogle-site-verification=cYJLTyQ-xyCKkHiC5Ye4Brne3kTKLyrMg70J_nDp2TI
TXTv=spf1 a mx include:mxroute.com ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.64.196, 172.67.155.84
IPv6 hints2606:4700:3030::6815:40c4, 2606:4700:3037::ac43:9b54
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=130, name=cloudflare-ech.com
SOAleland.ns.cloudflare.comdns@cloudflare.com serial=2410617457

us

DNSSEC🔒 Signed (DS record present)
NSa.cctld.us ⭐
NSb.cctld.us
NSf.cctld.us
NSk.cctld.us
NSm.cctld.us
NSn.cctld.us
NSw.cctld.us
NSx.cctld.us
NSy.cctld.us
SOAa.cctld.usadmin@tldns.godaddy serial=1785665679

Subdomains

ddns.flex-sys.us
emea.flex-sys.us
1.flex-sys.us
mail.flex-sys.us
us.flex-sys.us

Same first word

flex-sys.us

DNS History

29 records (8 active, 21 former)

20162017201820192020202120222023202420252026NSleland.ns.cloudflare.comoaklyn.ns.cloudflare.comns1.emea.flex-sys.usns1.extreme-computers.bizns1.extreme-computers.usns1.us.flex-sys.usns2.emea.flex-sys.usns2.extreme-computers.bizns2.extreme-computers.usns2.us.flex-sys.usMXmail.flex-sys.uswitcher.mxrouting.netmx.flex-sys.usA104.21.64.196172.67.155.842606:4700:3030::6815:40c42606:4700:3037::ac43:9b54172.64.80.1173.14.96.221188.114.96.0188.114.96.4188.114.97.0188.114.97.42606:4700:130:436c:6f75:6466:6c61:72652a06:98c1:3120::2a06:98c1:3120::42a06:98c1:3121::2a06:98c1:3121::446.101.244.75
●NSleland.ns.cloudflare.com2026-02-15 → 2026-08-02 · 3 obs
○ 2016-12-30 14:05:18
● 2026-02-15 15:53:12
● 2026-08-02 10:40:32
○NSns1.emea.flex-sys.us2016-01-19 → 2016-12-30 · 5 obs
○ 2015-10-23 23:45:10
● 2016-01-19 03:20:58
● 2016-12-30 14:05:18
○ 2026-02-15 15:53:12
○ 2026-08-02 10:40:32
○NSns1.extreme-computers.biz2015-07-11 → 2015-10-23 · 4 obs
● 2015-07-11 08:01:08
● 2015-10-23 23:45:10
○ 2016-01-19 03:20:58
○ 2026-08-02 10:40:32
○NSns1.extreme-computers.us2015-07-11 → 2015-10-23 · 4 obs
● 2015-07-11 08:01:08
● 2015-10-23 23:45:10
○ 2016-01-19 03:20:58
○ 2026-08-02 10:40:32
○NSns1.us.flex-sys.us2016-01-19 → 2016-12-30 · 5 obs
○ 2015-10-23 23:45:10
● 2016-01-19 03:20:58
● 2016-12-30 14:05:18
○ 2026-02-15 15:53:12
○ 2026-08-02 10:40:32
○NSns2.emea.flex-sys.us2016-01-19 → 2016-12-30 · 5 obs
○ 2015-10-23 23:45:10
● 2016-01-19 03:20:58
● 2016-12-30 14:05:18
○ 2026-02-15 15:53:12
○ 2026-08-02 10:40:32
○NSns2.extreme-computers.biz2015-07-11 → 2015-10-23 · 4 obs
● 2015-07-11 08:01:08
● 2015-10-23 23:45:10
○ 2016-01-19 03:20:58
○ 2026-08-02 10:40:32
○NSns2.extreme-computers.us2015-07-11 → 2015-10-23 · 4 obs
● 2015-07-11 08:01:08
● 2015-10-23 23:45:10
○ 2016-01-19 03:20:58
○ 2026-08-02 10:40:32
○NSns2.us.flex-sys.us2016-01-19 → 2016-12-30 · 5 obs
○ 2015-10-23 23:45:10
● 2016-01-19 03:20:58
● 2016-12-30 14:05:18
○ 2026-02-15 15:53:12
○ 2026-08-02 10:40:32
●NSoaklyn.ns.cloudflare.com2026-02-15 → 2026-08-02 · 3 obs
○ 2016-12-30 14:05:18
● 2026-02-15 15:53:12
● 2026-08-02 10:40:32
●MXmail.flex-sys.us2015-07-11 → 2026-08-02 · 2 obs
● 2015-07-11 08:01:08
● 2026-08-02 10:40:32
○MXmx.flex-sys.us2015-07-11 → 2016-12-30 · 4 obs
● 2015-07-11 08:01:08
● 2016-12-30 14:05:18
○ 2026-02-15 15:53:12
○ 2026-08-02 10:40:32
●MXwitcher.mxrouting.net2026-02-15 → 2026-08-02 · 3 obs
○ 2016-12-30 14:05:18
● 2026-02-15 15:53:12
● 2026-08-02 10:40:32
●A104.21.64.1962026-02-15 → 2026-08-02 · 17 obs
○ 2016-12-30 14:05:18
● 2026-02-15 15:53:12
● 2026-02-22 04:05:26
○ 2026-02-22 14:11:04
○ 2026-03-08 16:18:58
● 2026-03-08 18:19:18
● 2026-04-05 09:07:42
○ 2026-04-08 19:28:32
● 2026-04-13 06:56:50
● 2026-04-26 06:16:54
○ 2026-05-09 05:51:42
● 2026-05-31 14:01:06
○ 2026-07-09 22:21:00
● 2026-07-17 18:48:38
○ 2026-07-21 16:02:00
● 2026-07-27 18:27:50
● 2026-08-02 10:40:32
○A172.64.80.12026-02-22 → 2026-03-08 · 5 obs
○ 2026-02-22 04:05:26
● 2026-02-22 14:11:04
● 2026-03-08 16:18:58
○ 2026-03-08 18:19:18
○ 2026-08-02 10:40:32
●A172.67.155.842026-02-15 → 2026-08-02 · 17 obs
○ 2016-12-30 14:05:18
● 2026-02-15 15:53:12
● 2026-02-22 04:05:26
○ 2026-02-22 14:11:04
○ 2026-03-08 16:18:58
● 2026-03-08 18:19:18
● 2026-04-05 09:07:42
○ 2026-04-08 19:28:32
● 2026-04-13 06:56:50
● 2026-04-26 06:16:54
○ 2026-05-09 05:51:42
● 2026-05-31 14:01:06
○ 2026-07-09 22:21:00
● 2026-07-17 18:48:38
○ 2026-07-21 16:02:00
● 2026-07-27 18:27:50
● 2026-08-02 10:40:32
○A173.14.96.2212015-07-11 → 2015-10-23 · 4 obs
● 2015-07-11 08:01:08
● 2015-10-23 23:45:10
○ 2016-01-19 03:20:58
○ 2026-08-02 10:40:32
○A188.114.96.02026-04-08 → 2026-07-21 · 11 obs
○ 2026-04-05 09:07:42
● 2026-04-08 19:28:32
○ 2026-04-13 06:56:50
○ 2026-04-26 06:16:54
● 2026-05-09 05:51:42
○ 2026-05-31 14:01:06
● 2026-07-09 22:21:00
○ 2026-07-17 18:48:38
● 2026-07-21 16:42:38
○ 2026-07-27 18:27:50
○ 2026-08-02 10:40:32
○A188.114.96.42026-07-21 → 2026-07-21 · 4 obs
○ 2026-07-17 18:48:38
● 2026-07-21 16:02:00
○ 2026-07-21 16:42:38
○ 2026-08-02 10:40:32
○A188.114.97.02026-04-08 → 2026-07-21 · 11 obs
○ 2026-04-05 09:07:42
● 2026-04-08 19:28:32
○ 2026-04-13 06:56:50
○ 2026-04-26 06:16:54
● 2026-05-09 05:51:42
○ 2026-05-31 14:01:06
● 2026-07-09 22:21:00
○ 2026-07-17 18:48:38
● 2026-07-21 16:42:38
○ 2026-07-27 18:27:50
○ 2026-08-02 10:40:32
○A188.114.97.42026-07-21 → 2026-07-21 · 4 obs
○ 2026-07-17 18:48:38
● 2026-07-21 16:02:00
○ 2026-07-21 16:42:38
○ 2026-08-02 10:40:32
○A2606:4700:130:436c:6f75:6466:6c61:72652026-02-22 → 2026-03-08 · 5 obs
○ 2026-02-16 10:23:00
● 2026-02-22 04:05:26
● 2026-03-08 16:18:58
○ 2026-03-08 18:19:18
○ 2026-08-02 10:40:32
●A2606:4700:3030::6815:40c42026-02-15 → 2026-08-02 · 17 obs
○ 2016-12-30 14:05:18
● 2026-02-15 15:53:12
● 2026-02-16 10:23:00
○ 2026-02-22 04:05:26
○ 2026-03-08 16:18:58
● 2026-03-08 18:19:18
● 2026-04-05 09:07:42
○ 2026-04-08 19:28:32
● 2026-04-13 06:56:50
● 2026-04-26 06:16:54
○ 2026-05-09 05:51:42
● 2026-05-31 14:01:06
○ 2026-07-09 22:21:00
● 2026-07-17 18:48:38
○ 2026-07-21 16:02:00
● 2026-07-27 18:27:50
● 2026-08-02 10:40:32
●A2606:4700:3037::ac43:9b542026-02-15 → 2026-08-02 · 17 obs
○ 2016-12-30 14:05:18
● 2026-02-15 15:53:12
● 2026-02-16 10:23:00
○ 2026-02-22 04:05:26
○ 2026-03-08 16:18:58
● 2026-03-08 18:19:18
● 2026-04-05 09:07:42
○ 2026-04-08 19:28:32
● 2026-04-13 06:56:50
● 2026-04-26 06:16:54
○ 2026-05-09 05:51:42
● 2026-05-31 14:01:06
○ 2026-07-09 22:21:00
● 2026-07-17 18:48:38
○ 2026-07-21 16:02:00
● 2026-07-27 18:27:50
● 2026-08-02 10:40:32
○A2a06:98c1:3120::2026-04-08 → 2026-07-21 · 11 obs
○ 2026-04-05 09:07:42
● 2026-04-08 19:28:32
○ 2026-04-13 06:56:50
○ 2026-04-26 06:16:54
● 2026-05-09 05:51:42
○ 2026-05-31 14:01:06
● 2026-07-09 22:21:00
○ 2026-07-17 18:48:38
● 2026-07-21 16:42:38
○ 2026-07-27 18:27:50
○ 2026-08-02 10:40:32
○A2a06:98c1:3120::42026-07-21 → 2026-07-21 · 4 obs
○ 2026-07-17 18:48:38
● 2026-07-21 16:02:00
○ 2026-07-21 16:42:38
○ 2026-08-02 10:40:32
○A2a06:98c1:3121::2026-04-08 → 2026-07-21 · 11 obs
○ 2026-04-05 09:07:42
● 2026-04-08 19:28:32
○ 2026-04-13 06:56:50
○ 2026-04-26 06:16:54
● 2026-05-09 05:51:42
○ 2026-05-31 14:01:06
● 2026-07-09 22:21:00
○ 2026-07-17 18:48:38
● 2026-07-21 16:42:38
○ 2026-07-27 18:27:50
○ 2026-08-02 10:40:32
○A2a06:98c1:3121::42026-07-21 → 2026-07-21 · 4 obs
○ 2026-07-17 18:48:38
● 2026-07-21 16:02:00
○ 2026-07-21 16:42:38
○ 2026-08-02 10:40:32
○A46.101.244.752016-01-19 → 2016-12-30 · 5 obs
○ 2015-10-23 23:45:10
● 2016-01-19 03:20:58
● 2016-12-30 14:05:18
○ 2026-02-15 15:53:12
○ 2026-08-02 10:40:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
usk.cctld.us, w.cctld.us, b.cctld.us, f.cctld.us...-
flex-sys.usoaklyn.ns.cloudflare.com, leland.ns.cloudflare.com-

✅ Authoritative Response

Server:162.159.38.90

NS records: oaklyn.ns.cloudflare.com, leland.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for flex-sys.us (unsigned zone)

⏱️ Timing

Total: 1203ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.155.84, 104.21.64.196
AAAA22606:4700:3030::6815:40c4, 2606:4700:3037::ac43:9b54
NS2leland.ns.cloudflare.com, oaklyn.ns.cloudflare.com
MX2mail.flex-sys.us (pri: 10), witcher.mxrouting.net (pri: 5)
TXT2google-site-verification=cYJLTyQ-xyCKkHi, v=spf1 a mx include:mxroute.com ~all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1leland.ns.cloudflare.com dns.cloudflare.

Analysis

Hierarchy

flex-sys.us has five child domains: ddns.flex-sys.us, emea.flex-sys.us, 1.flex-sys.us, mail.flex-sys.us and us.flex-sys.us.

IP Addresses

flex-sys.us directs to four IP numbers, which are 104.21.64.196, 172.67.155.84, 2606:4700:3030::6815:40c4 and 2606:4700:3037::ac43:9b54.

Additional host names — botbot-discord-staging.titanic.workers.dev, mobilea11y.com, www.cmdragonboat.org.mo and two others — share IP numbers with flex-sys.us.

Name Servers

flex-sys.us uses two name servers for its delegation: leland.ns.cloudflare.com and oaklyn.ns.cloudflare.com.

flex-sys.us shares its name server setup with other domains, including emlina.com, friendswithmoney.net, argsec.com and two others.

There is at least partial name server overlap between flex-sys.us and other domains — nexushealthpro.com, pasayslots03.com, v2rayshare.net and two more among them.

The name servers elma.ns.cloudflare.com, eloise.ns.cloudflare.com and alberto.ns.cloudflare.com are often found in combination with these name servers.

Host names with 6 IP numbers:

Hostname leland.ns.cloudflare.com directs to 108.162.195.8, 162.159.44.8 and 172.64.35.8 along with 3 other IP addresses.

Hostname oaklyn.ns.cloudflare.com directs to 108.162.194.90, 162.159.38.90 and 172.64.34.90 along with 3 other IP addresses.

Mail Servers

flex-sys.us has two mail servers: witcher.mxrouting.net and mail.flex-sys.us.

flex-sys.us shares mail servers — at least in part — with other domains, including forktastic.com, giocc.com, naturligtvis.info and two others.

These mail servers are frequently seen alongside the mail servers witcher-relay.mxrouting.net.

Host names pointing to a single IP address:

witcher.mxrouting.net has the IP address 45.43.208.43.