smartletter.us - robtex.com
smartletter.us
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3036::6815:5679🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::ac43:db0c🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.86.121Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.219.12🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | iris.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::adf5:3a76🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | iris.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c076🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | iris.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2076🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | iris.ns.cloudflare.com | ||||||
| A | 108.162.192.118🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | iris.ns.cloudflare.com | ||||||
| A | 172.64.32.118🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | iris.ns.cloudflare.com | ||||||
| A | 173.245.58.118🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | iris.ns.cloudflare.com | ||||||
| NS | venkat.ns.cloudflare.com | ||||||
| A | 2606:4700:58::a29f:2cfe🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | venkat.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c3fe🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | venkat.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:23fe🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | venkat.ns.cloudflare.com | ||||||
| A | 108.162.195.254🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | venkat.ns.cloudflare.com | ||||||
| A | 162.159.44.254Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | venkat.ns.cloudflare.com | ||||||
| A | 172.64.35.254🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | venkat.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.86.121, 172.67.219.12 | ||||||
| IPv6 | 2606:4700:3036::6815:5679, 2606:4700:3037::ac43:db0c | ||||||
| SOA | iris.ns.cloudflare.comdns@cloudflare.com serial=2399339702 | ||||||
us
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.cctld.us ⭐ | ||||||
| NS | b.cctld.us | ||||||
| NS | f.cctld.us | ||||||
| NS | k.cctld.us | ||||||
| NS | m.cctld.us | ||||||
| NS | n.cctld.us | ||||||
| NS | w.cctld.us | ||||||
| NS | x.cctld.us | ||||||
| NS | y.cctld.us | ||||||
| SOA | a.cctld.usadmin@tldns.godaddy serial=1773555288 | ||||||
rank #2477 in the tld
📈 Tranco rank: #441,105
Same first word
smartletter.com |
smartletter.us |
Similar names
DNS History
7 records (6 active, 1 former)
●NSiris.ns.cloudflare.com2026-02-26 → 2026-03-24 · 2 obs
● 2026-03-24 03:33:14
●NSvenkat.ns.cloudflare.com2026-02-26 → 2026-03-24 · 2 obs
● 2026-03-24 03:33:14
●A104.21.86.1212026-02-26 → 2026-03-24 · 4 obs
● 2026-03-19 14:32:16
○ 2026-03-19 15:20:18
● 2026-03-24 03:33:14
○A172.64.80.12026-03-19 → 2026-03-19 · 3 obs
● 2026-03-19 15:20:18
○ 2026-03-24 03:33:14
●A172.67.219.122026-02-26 → 2026-03-24 · 4 obs
● 2026-03-19 14:32:16
○ 2026-03-19 15:20:18
● 2026-03-24 03:33:14
●A2606:4700:3036::6815:56792026-02-26 → 2026-03-24 · 2 obs
● 2026-03-24 03:33:14
●A2606:4700:3037::ac43:db0c2026-02-26 → 2026-03-24 · 2 obs
● 2026-03-24 03:33:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| us | y.cctld.us, k.cctld.us, b.cctld.us, x.cctld.us... | - |
| smartletter.us | iris.ns.cloudflare.com, venkat.ns.cloudflare.com | - |
✅ Authoritative Response
Server:162.159.44.254
NS records: iris.ns.cloudflare.com, venkat.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for smartletter.us (unsigned zone)
⏱️ Timing
Total: 449ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.86.121, 172.67.219.12 |
| AAAA | 2 | 2606:4700:3036::6815:5679, 2606:4700:3037::ac43:db0c |
| NS | 2 | iris.ns.cloudflare.com, venkat.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | iris.ns.cloudflare.com dns.cloudflare.co |
Analysis
IP Addresses
smartletter.us points to four IP numbers: 2606:4700:3036::6815:5679, 2606:4700:3037::ac43:db0c, 104.21.86.121 and 172.67.219.12.
Other host names, for instance packdemujeres.com, jasg-defender.pro, dlhjxf.com, rompetrol.bg and eneloop.ca share IP numbers with smartletter.us.
Name Servers
smartletter.us is delegated to two name servers: iris.ns.cloudflare.com and venkat.ns.cloudflare.com.
smartletter.us uses the same name server setup as other domains, for instance freshspace.us, 889992225.xyz, cleargaminghouse.com, visionclubhub.com and blogstart.at.
smartletter.us shares name servers with other domains at least partially, for instance valcredi.coop.br, casino-perth.com, pushjet.io, ru-put.xyz and anime.cl.
these name servers are commonly used together with cass.ns.cloudflare.com and tanner.ns.cloudflare.com.
Host names with six IP numbers: iris.ns.cloudflare.com points to 2606:4700:50::adf5:3a76, 2803:f800:50::6ca2:c076, 2a06:98c1:50::ac40:2076, 108.162.192.118, 172.64.32.118 and 173.245.58.118; venkat.ns.cloudflare.com points to 2606:4700:58::a29f:2cfe, 2803:f800:50::6ca2:c3fe, 2a06:98c1:50::ac40:23fe, 108.162.195.254, 162.159.44.254 and 172.64.35.254.