sendblue.co - robtex.com
sendblue.co
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:20::681a:811🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:20::681a:911🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:20::ac43:461f🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.26.8.17Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.26.9.17Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.70.31🇺🇸 Cloudflare172.67.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | algin.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::adf5:3b3d🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | algin.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c13d🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | algin.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:213d🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | algin.ns.cloudflare.com | ||||||
| A | 108.162.193.61🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | algin.ns.cloudflare.com | ||||||
| A | 172.64.33.61🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | algin.ns.cloudflare.com | ||||||
| A | 173.245.59.61🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | algin.ns.cloudflare.com | ||||||
| NS | isla.ns.cloudflare.com | ||||||
| A | 2606:4700:50::adf5:3a77🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | isla.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c077🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | isla.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2077🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | isla.ns.cloudflare.com | ||||||
| A | 108.162.192.119🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | isla.ns.cloudflare.com | ||||||
| A | 172.64.32.119🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | isla.ns.cloudflare.com | ||||||
| A | 173.245.58.119🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | isla.ns.cloudflare.com | ||||||
| MX | alt1.aspmx.l.google.com ⭐ | ||||||
| A | 2607:f8b0:4003:c30::1b🇺🇸 Google2607:f8b0:4003::/48 | ||||||
| PTR | yutulis-in-f27.1e100.net | ||||||
| A | 74.125.27.26🇺🇸 Google74.125.27.0/24 | ||||||
| PTR | yutulis-in-f26.1e100.net | ||||||
| MX | aspmx.l.google.com ⭐ | ||||||
| A | 2607:f8b0:4004:c19::1b🇺🇸 Google2607:f8b0:4004::/48 | ||||||
| PTR | bk-in-f27.1e100.net | ||||||
| A | 172.253.62.27🇺🇸 Google172.253.62.0/24 | ||||||
| PTR | bc-in-f27.1e100.net | ||||||
| TXT | firebase=bluetexts-272923 | ||||||
| TXT | google-site-verification=lPZd-4jlSfKVzNLuWUq3R2Ik_IUlIiu5p6BKUvXLmA8 | ||||||
| TXT | google-site-verification=qgamkJ4pOFaTyvTmuw2YMuTLzkbzCpEH9kjGNPWsrvs | ||||||
| TXT | paddle-verification=99e6a01a | ||||||
| TXT | v=spf1 include:_spf.firebasemail.com ~all | ||||||
| HTTPS | HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.26.8.17, 104.26.9.17, 172.67.70.31 | ||||||
| IPv6 | 2606:4700:20::681a:811, 2606:4700:20::681a:911, 2606:4700:20::ac43:461f | ||||||
| SOA | algin.ns.cloudflare.comdns@cloudflare.com serial=2398067155 | ||||||
co
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns0.centralnic.net ⭐ | ||||||
| NS | a.registrydns.co | ||||||
| NS | b.registrydns.co | ||||||
| NS | c.registrydns.co | ||||||
| NS | d.registrydns.co | ||||||
| SOA | ns0.centralnic.nethostmaster@centralnic.net serial=1759615358 | ||||||
Same first word
Similar names
DNS History
10 records (10 active, 0 former)
●NSalgin.ns.cloudflare.com2026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●NSisla.ns.cloudflare.com2026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●MXalt1.aspmx.l.google.com2026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●MXaspmx.l.google.com2026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●A104.26.8.172026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●A104.26.9.172026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●A172.67.70.312026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●A2606:4700:20::681a:8112026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●A2606:4700:20::681a:9112026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
●A2606:4700:20::ac43:461f2026-02-15 → 2026-03-24 · 2 obs
● 2026-03-24 11:56:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| co | a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co | - |
| sendblue.co | algin.ns.cloudflare.com, isla.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.192.119
NS records: algin.ns.cloudflare.com, isla.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sendblue.co (unsigned zone)
⏱️ Timing
Total: 493ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 3 | 104.26.8.17, 104.26.9.17... |
| AAAA | 3 | 2606:4700:20::681a:911, 2606:4700:20::ac43:461f... |
| NS | 2 | algin.ns.cloudflare.com, isla.ns.cloudflare.com |
| MX | 2 | alt1.aspmx.l.google.com (pri: 10), aspmx.l.google.com (pri: 10) |
| TXT | 5 | firebase=bluetexts-272923, google-site-verification=lPZd-4jlSfKVzNL... |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h2"] |
| SOA | 1 | algin.ns.cloudflare.com dns.cloudflare.c |
Analysis
IP Addresses
Six IP numbers are pointed to by sendblue.co: 2606:4700:20::681a:811, 2606:4700:20::681a:911, 2606:4700:20::ac43:461f, 104.26.8.17, 104.26.9.17 and 172.67.70.31.
Other host names, for instance hzplay.fun, www.limitedresell.com, app.lendtable.com, grnd.media and engineeringjobs.net share IP numbers with sendblue.co.
Name Servers
sendblue.co is delegated to two name servers: algin.ns.cloudflare.com and isla.ns.cloudflare.com.
sendblue.co uses the same name server setup as other domains, for instance v6-moving-pictures.com, badbatchbaking.com, bitsense.ro, mayaserghi.com and energiata.com.
sendblue.co shares name servers with other domains at least partially, for instance topboard.org, al2gruas.es, simplyjanuary.de, some.education and activityuk.com.
these name servers are often used together with the name servers arya.ns.cloudflare.com.
Host names with six IP numbers: algin.ns.cloudflare.com points to 2606:4700:58::adf5:3b3d, 2803:f800:50::6ca2:c13d, 2a06:98c1:50::ac40:213d, 108.162.193.61, 172.64.33.61 and 173.245.59.61; isla.ns.cloudflare.com points to 2606:4700:50::adf5:3a77, 2803:f800:50::6ca2:c077, 2a06:98c1:50::ac40:2077, 108.162.192.119, 172.64.32.119 and 173.245.58.119.
Mail Servers
sendblue.co is handled by two mail servers: aspmx.l.google.com and alt1.aspmx.l.google.com.
sendblue.co shares the same mail server setup as other domains, including highschoolsportsapps.com, arlingtonboathouse.org, ramallah.ps, rors.in and pittard.info.
sendblue.co shares some mail servers with other domains, including aeromac.com, passportivity.com, ns500759.ns500759.ns500759.ns500758.ns500736.ns500735.ns500736.ns500708.ns500619.ns500576.ns500652.ns500576.ns500619.tracksymphony.com, ns500731.ns500731.ns500731.ns500704.ns500671.ns500704.ns500704.ns500678.ns500688.ns500688.ns500671.ns500649.ns500649.lustychickser.com and expact.jp.
These mail servers are commonly used with alt2.aspmx.l.google.com, alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and aspmx5.googlemail.com.
Host names with two IP numbers:
The host aspmx.l.google.com points to 2607:f8b0:4004:c19::1b and 172.253.62.27.
The host alt1.aspmx.l.google.com points to 2607:f8b0:4003:c30::1b and 74.125.27.26.