rtfeldman.com - dns.ninja

`rtfeldman.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::6815:3d7d^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:d283^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.61.125^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.210.131^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`bristol.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:262f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bristol.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c22f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`bristol.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:222f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`bristol.ns.cloudflare.com`
		A	108.162.194.47^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bristol.ns.cloudflare.com`
		A	162.159.38.47^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bristol.ns.cloudflare.com`
		A	172.64.34.47^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bristol.ns.cloudflare.com`
NS	`lou.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bc7^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lou.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1c7^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lou.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21c7^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lou.ns.cloudflare.com`
		A	108.162.193.199^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lou.ns.cloudflare.com`
		A	172.64.33.199^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lou.ns.cloudflare.com`
		A	173.245.59.199^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lou.ns.cloudflare.com`
MX	`in1-smtp.messagingengine.com` ⭐
		A	103.168.172.216^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-01.messagingengine.com`
		A	103.168.172.217^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-02.messagingengine.com`
		A	103.168.172.218^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-03.messagingengine.com`
		A	103.168.172.219^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-04.messagingengine.com`
		A	103.168.172.220^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-05.messagingengine.com`
		A	103.168.172.221^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-06.messagingengine.com`
		A	103.168.172.222^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-07.messagingengine.com`
		A	103.168.172.223^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-08.messagingengine.com`
MX	`in2-smtp.messagingengine.com`⁽²⁰⁾
		A	202.12.124.216^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-01.messagingengine.com`
		A	202.12.124.217^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-02.messagingengine.com`
		A	202.12.124.218^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-03.messagingengine.com`
		A	202.12.124.219^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-04.messagingengine.com`
TXT	`v=spf1 include:spf.messagingengine.com ?all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.61.125, 172.67.210.131
		IPv6 hints	2606:4700:3030::6815:3d7d, 2606:4700:3035::ac43:d283
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=10, name=cloudflare-ech.com
SOA	`bristol.ns.cloudflare.com`dns@cloudflare.com serial=2409528905

`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=1786678089

rank #948295 globally
rank #407157 in the tld

Same first word

rtfeldman.com

Similar names

marnfeldt.se

DNS History

17 records (8 active, 9 former)

●NSbristol.ns.cloudflare.com2026-08-14 → 2026-08-14 · 2 obs

○ 2026-02-17 17:23:40
● 2026-08-14 03:55:32

○NSdns1.registrar-servers.com2026-02-17 → 2026-02-17 · 3 obs

○ 2017-11-26 19:32:02
● 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

○NSdns2.registrar-servers.com2026-02-17 → 2026-02-17 · 3 obs

○ 2017-11-26 19:32:02
● 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

●NSlou.ns.cloudflare.com2026-08-14 → 2026-08-14 · 2 obs

○ 2026-02-17 17:23:40
● 2026-08-14 03:55:32

○NSns1dhl.name.com2015-08-06 → 2017-11-26 · 4 obs

● 2015-08-06 10:36:32
● 2017-11-26 19:32:02
○ 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

○NSns2bls.name.com2015-08-06 → 2017-11-26 · 4 obs

● 2015-08-06 10:36:32
● 2017-11-26 19:32:02
○ 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

○NSns3jwx.name.com2015-08-06 → 2017-11-26 · 4 obs

● 2015-08-06 10:36:32
● 2017-11-26 19:32:02
○ 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

○NSns4htz.name.com2015-08-06 → 2017-11-26 · 4 obs

● 2015-08-06 10:36:32
● 2017-11-26 19:32:02
○ 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

●MXin1-smtp.messagingengine.com2026-02-17 → 2026-08-14 · 2 obs

● 2026-02-17 17:23:40
● 2026-08-14 03:55:32

●MXin2-smtp.messagingengine.com2026-02-17 → 2026-08-14 · 2 obs

● 2026-02-17 17:23:40
● 2026-08-14 03:55:32

●A104.21.61.1252026-08-14 → 2026-08-14 · 2 obs

○ 2026-02-17 17:23:40
● 2026-08-14 03:55:32

●A172.67.210.1312026-08-14 → 2026-08-14 · 2 obs

○ 2026-02-17 17:23:40
● 2026-08-14 03:55:32

●A2606:4700:3030::6815:3d7d2026-08-14 → 2026-08-14 · 2 obs

○ 2026-02-17 17:23:40
● 2026-08-14 03:55:32

●A2606:4700:3035::ac43:d2832026-08-14 → 2026-08-14 · 2 obs

○ 2026-02-17 17:23:40
● 2026-08-14 03:55:32

○A66.6.44.42015-08-06 → 2017-11-26 · 4 obs

● 2015-08-06 10:36:32
● 2017-11-26 19:32:02
○ 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

○A75.2.60.52026-02-17 → 2026-02-17 · 3 obs

○ 2017-11-26 19:32:02
● 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

○A99.83.231.612026-02-17 → 2026-02-17 · 3 obs

○ 2017-11-26 19:32:02
● 2026-02-17 17:23:40
○ 2026-08-14 03:55:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
rtfeldman.com	lou.ns.cloudflare.com, bristol.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.199

NS records: lou.ns.cloudflare.com, bristol.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rtfeldman.com (unsigned zone)

⏱️ Timing

Total: 635ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.61.125, 172.67.210.131`
AAAA	2	`2606:4700:3030::6815:3d7d, 2606:4700:3035::ac43:d283`
NS	2	`bristol.ns.cloudflare.com, lou.ns.cloudflare.com`
MX	2	`in1-smtp.messagingengine.com (pri: 10), in2-smtp.messagingengine.com (pri: 20)`
TXT	1	`v=spf1 include:spf.messagingengine.com ?`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`bristol.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

rtfeldman.com resolves to four IP addresses: 104.21.61.125, 172.67.210.131, 2606:4700:3030::6815:3d7d and 2606:4700:3035::ac43:d283.

Among the host names that share IP numbers with rtfeldman.com are www.fontshop.com, oilseed.org, wanc-bd.com.cn and two others.

Name Servers

rtfeldman.com has two authoritative name servers — bristol.ns.cloudflare.com and lou.ns.cloudflare.com.

rtfeldman.com has the same name server delegation as a number of other domains, such as ppatsicherheit.live, portal-qfex.xyz, dordai.com and two more.

rtfeldman.com partially shares its NS delegation with several other domains, including varasverdes.com, gumdrophairdressing.com, nortterra.com and two others.

These name servers are regularly seen alongside dakota.ns.cloudflare.com and lewis.ns.cloudflare.com as name servers.

Host names resolving to 6 IP numbers:

bristol.ns.cloudflare.com points to 108.162.194.47, 162.159.38.47, 172.64.34.47 and 3 other IP addresses.

lou.ns.cloudflare.com points to 108.162.193.199, 172.64.33.199, 173.245.59.199 and 3 other IP addresses.

Mail Servers

The MX records for rtfeldman.com point to two mail servers: in1-smtp.messagingengine.com and in2-smtp.messagingengine.com.

rtfeldman.com has the same mail server arrangement as a number of other domains, for example bitonio.us, fusewp.com, digitalocean-web01.karere.co.nz and two more.

Host names resolving to 8 IP numbers:

in1-smtp.messagingengine.com points to 103.168.172.216, 103.168.172.217, 103.168.172.218 and 5 other IP addresses.

Hosts pointing to four IP addresses:

in2-smtp.messagingengine.com maps to the following IP addresses: 202.12.124.216, 202.12.124.217, 202.12.124.218 and 202.12.124.219.