isp.ac - dns.ninja
isp.ac
ac
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.nic.ac ⭐ | ||||||
| NS | a2.nic.ac | ||||||
| NS | b0.nic.ac | ||||||
| NS | c0.nic.ac | ||||||
| SOA | a0.nic.achostmaster@donuts.email serial=1783660170 | ||||||
Subdomains
www.isp.ac |
Same first word
Similar names
DNS History
7 records (3 active, 4 former)
●NSa.dns.park.io2026-07-08 → 2026-07-10 · 3 obs
● 2026-07-08 19:35:30
● 2026-07-10 05:22:52
●NSb.dns.park.io2026-07-08 → 2026-07-10 · 3 obs
● 2026-07-08 19:35:30
● 2026-07-10 05:22:52
○NSdns.ecc.u-tokyo.ac.jp2015-08-21 → 2016-12-31 · 4 obs
● 2016-12-31 17:08:34
○ 2026-07-08 19:35:30
○ 2026-07-10 05:22:52
○NSdns101.ecc.u-tokyo.ac.jp2015-08-21 → 2016-12-31 · 4 obs
● 2016-12-31 17:08:34
○ 2026-07-08 19:35:30
○ 2026-07-10 05:22:52
○NSinfoblox.ecc.u-tokyo.ac.jp2015-08-21 → 2016-12-31 · 4 obs
● 2016-12-31 17:08:34
○ 2026-07-08 19:35:30
○ 2026-07-10 05:22:52
○MXsmtp-d.ecc.u-tokyo.ac.jp2015-08-21 → 2016-12-31 · 4 obs
● 2016-12-31 17:08:34
○ 2026-07-08 19:35:30
○ 2026-07-10 05:22:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ac | a2.nic.ac, c0.nic.ac, a0.nic.ac, b0.nic.ac | 8 records |
| isp.ac | b.dns.park.io, a.dns.park.io | - |
✅ Authoritative Response
Server:23.23.95.213
NS records: b.dns.park.io, a.dns.park.io
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for isp.ac (unsigned zone)
⏱️ Timing
Total: 554ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | park.io |
| SOA | 1 | a.dns.park.io 2014070706 |
📌 Glue Records Collected
Total: 8
In-bailiwick: 8 (c0.nic.ac, b0.nic.ac, a2.nic.ac...)
Analysis
Hierarchy
The domain www.isp.ac falls under the parent isp.ac.
IP Addresses
isp.ac points to the IP addresses 54.147.18.156 and 98.87.112.136
Other hosts including ec2-54-147-18-156.compute-1.amazonaws.com, app.park.io and park.io share IP addresses with isp.ac.
Name Servers
Four name servers handle the delegation for isp.ac: ns-441.awsdns-55.com, ns-672.awsdns-20.net, ns-1348.awsdns-40.org and ns-1624.awsdns-11.co.uk.
At least some of isp.ac's name servers are shared with other domains, for example dputkvznm0b09.cloudfront.net, d3622gotp4qdvg.cloudfront.net, donnellsmotorcycles.com and two more.
Four hostnames, each resolving to a pair of IP addresses: ns-441.awsdns-55.com directs to 205.251.193.185 and 2600:9000:5301:b900::1; ns-672.awsdns-20.net directs to 205.251.194.160 and 2600:9000:5302:a000::1; ns-1348.awsdns-40.org directs to 205.251.197.68 and 2600:9000:5305:4400::1; ns-1624.awsdns-11.co.uk directs to 205.251.198.88 and 2600:9000:5306:5800::1.
Mail Servers
isp.ac has five mail servers, which are aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.
At least some of the mail servers used by isp.ac are shared with other domains: ns500734.ns500734.ns500693.ns500693.ns500699.ns500699.ns500699.ns500588.ns500588.ns500588.ns500683.ns500693.ns500699.ns500612.ns500110.dtrkdll.com, ns500768.ns500736.ns500735.ns500735.ns500735.ns500736.ns500735.ns500735.ns500736.ns500698.ns500576.ns500619.ns500698.trackreceptor.com, brcoh.org and two others among them.
These mail servers are often deployed together with alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 other mail servers.
Host names pointing to two IP addresses:
aspmx2.googlemail.com points to 108.177.123.26 and 2800:3f0:4003:c0f::1a.
aspmx3.googlemail.com points to 172.253.116.27 and 2a00:1450:400b:c02::1b.
aspmx.l.google.com points to 142.251.163.26 and 2607:f8b0:4004:c1d::1b.
alt1.aspmx.l.google.com points to 108.177.123.27 and 2800:3f0:4003:c0f::1b.
alt2.aspmx.l.google.com points to 172.253.116.26 and 2a00:1450:400b:c02::1a.