tsukuba-science.com - robtex.com
tsukuba-science.com
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.netnstld@verisign-grs.com serial=1778815561 | ||||||
Previously MX for
tsukuba-science.com |
Same first word
tsukuba-science.com |
DNS History
15 records (10 active, 5 former)
●NSns-1044.awsdns-02.org2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
●NSns-1650.awsdns-14.co.uk2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
●NSns-465.awsdns-58.com2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
●NSns-728.awsdns-27.net2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
○NSns1.sixcore.ne.jp2015-06-08 → 2016-04-11 · 4 obs
● 2016-04-11 07:03:36
○ 2016-09-16 00:08:46
○ 2026-05-15 03:55:42
○NSns2.sixcore.ne.jp2015-06-08 → 2016-04-11 · 4 obs
● 2016-04-11 07:03:36
○ 2016-09-16 00:08:46
○ 2026-05-15 03:55:42
○NSns3.sixcore.ne.jp2015-06-08 → 2016-04-11 · 4 obs
● 2016-04-11 07:03:36
○ 2016-09-16 00:08:46
○ 2026-05-15 03:55:42
●MXalt1.aspmx.l.google.com2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
●MXalt2.aspmx.l.google.com2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
●MXalt3.aspmx.l.google.com2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
●MXalt4.aspmx.l.google.com2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
●MXaspmx.l.google.com2016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
○MXtsukuba-science.com2015-06-08 → 2016-04-11 · 4 obs
● 2016-04-11 07:03:36
○ 2016-09-16 00:08:46
○ 2026-05-15 03:55:42
●A133.130.121.1342016-09-16 → 2026-05-15 · 3 obs
● 2016-09-16 00:08:46
● 2026-05-15 03:55:42
○A157.112.144.92015-06-08 → 2016-04-11 · 4 obs
● 2016-04-11 07:03:36
○ 2016-09-16 00:08:46
○ 2026-05-15 03:55:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| tsukuba-science.com | ns-728.awsdns-27.net, ns-465.awsdns-58.com, ns-1650.awsdns-14.co.uk, ns-1044.awsdns-02.org | 2 records |
✅ Authoritative Response
Server:205.251.193.209
NS records: ns-728.awsdns-27.net, ns-465.awsdns-58.com, ns-1650.awsdns-14.co.uk, ns-1044.awsdns-02.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for tsukuba-science.com (unsigned zone)
⏱️ Timing
Total: 424ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 133.130.121.134 |
| NS | 4 | ns-1044.awsdns-02.org, ns-1650.awsdns-14.co.uk... |
| MX | 5 | aspmx.l.google.com (pri: 10), alt1.aspmx.l.google.com (pri: 20)... |
| SOA | 1 | ns-1044.awsdns-02.org awsdns-hostmaster. |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-465.awsdns-58.com, ns-465.awsdns-58.com)
Analysis
IP Addresses
tsukuba-science.com points to a single IP address: 133.130.121.134.
Other host names, for instance tsukuba-kagaku.co.jp, share IP numbers with tsukuba-science.com.
Name Servers
tsukuba-science.com is delegated to four name servers: ns-465.awsdns-58.com, ns-728.awsdns-27.net, ns-1044.awsdns-02.org and ns-1650.awsdns-14.co.uk.
tsukuba-science.com at least partially shares name servers with other domains, for example docfinder.co.in, bridgemanimages.fr, alixandlewis.com, dovebarn.com and electric-dance.com.
Host names with two IP numbers:
ns-465.awsdns-58.com points to: 2600:9000:5301:d100::1 and 205.251.193.209
ns-728.awsdns-27.net points to: 2600:9000:5302:d800::1 and 205.251.194.216
ns-1044.awsdns-02.org points to: 2600:9000:5304:1400::1 and 205.251.196.20
ns-1650.awsdns-14.co.uk points to: 2600:9000:5306:7200::1 and 205.251.198.114
Mail Servers
tsukuba-science.com is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.
tsukuba-science.com shares at least partially some mail servers with other domains, for instance ns500734.ns500734.ns500693.ns500693.ns500734.ns500699.ns500699.ns500699.ns500588.ns500699.ns500699.ns500588.ns500588.ns500632.ns500588.ns500112.dtrkdll.com, ns500698.ns500698.ns500698.ns500759.ns500758.ns500735.ns500698.ns500698.ns500735.ns500576.ns500576.ns500686.ns500576.ns500619.ns500576.trackreceptor.com, ns500698.ns500758.ns500698.ns500759.ns500698.ns500736.ns500735.ns500708.ns500576.ns500576.ns500698.ns500576.ns500619.trackreceptor.com, ns500759.ns500759.ns500698.ns500736.ns500736.ns500736.ns500735.ns500735.ns500735.ns500698.ns500619.ns500619.ns500576.ns500576.trackreceptor.com and ns500742.ns500742.ns500742.ns500704.ns500678.ns500291.ns500671.ns500649.lustychickser.com.
these mail servers are often used together with aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and aspmx5.googlemail.com.
Host names with two IP numbers
Each host name points to two IP numbers:
aspmx.l.google.com points to 2607:f8b0:4004:c09::1a and 172.253.62.27
alt1.aspmx.l.google.com points to 2800:3f0:4003:c0f::1a and 108.177.123.27
alt2.aspmx.l.google.com points to 2a00:1450:400b:c02::1b and 172.253.116.27
alt3.aspmx.l.google.com points to 2a00:1450:4009:c0f::1b and 192.178.223.27
alt4.aspmx.l.google.com points to 2a00:1450:400c:c00::1b and 173.194.76.26