course.gr - robtex.com
course.gr
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2a00:1c98:1010:1::e5🇧🇪 COMBELL-AS2a00:1c98::/32 COMBELL Network | ||||||
| PTR | linux3207.grserver.gr | ||||||
| A | 213.158.90.235🇮🇹 COMBELL-AS213.158.90.0/24 Enartia services in Belgium | ||||||
| NS | ns306.grserver.gr ⭐ | ||||||
| A | 2a00:1c98:1010:1::e5🇧🇪 COMBELL-AS2a00:1c98::/32 COMBELL Network | ||||||
| PTR | linux3207.grserver.gr | ||||||
| A | 213.158.90.235🇮🇹 COMBELL-AS213.158.90.0/24 Enartia services in Belgium | ||||||
| PTR | linux3207.grserver.gr | ||||||
| NS | ns305.grserver.gr | ||||||
| A | 2a00:1c98:1010:1::e5🇧🇪 COMBELL-AS2a00:1c98::/32 COMBELL Network | ||||||
| PTR | linux3207.grserver.gr | ||||||
| A | 213.158.90.235🇮🇹 COMBELL-AS213.158.90.0/24 Enartia services in Belgium | ||||||
| PTR | linux3207.grserver.gr | ||||||
| MX | mail.course.gr ⭐ | ||||||
| A | 2a00:1c98:1010:1::e5🇧🇪 COMBELL-AS2a00:1c98::/32 COMBELL Network | ||||||
| PTR | linux3207.grserver.gr | ||||||
| A | 213.158.90.235🇮🇹 COMBELL-AS213.158.90.0/24 Enartia services in Belgium | ||||||
| PTR | linux3207.grserver.gr | ||||||
| TXT | v=spf1 +a +mx include:_spf.fastmail.gr +ip6:2a00:1c98:1010:1::e5 -all | ||||||
| SOA | ns306.grserver.grhostmaster@grserver.gr 2025-06-16 #14 | ||||||
gr
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | grdns.ics.forth.gr ⭐ | ||||||
| NS | estia.ics.forth.gr | ||||||
| NS | gr-at.ics.forth.gr | ||||||
| NS | gr-c.ics.forth.gr | ||||||
| NS | gr-d.ics.forth.gr | ||||||
| NS | gr-m.ics.forth.gr | ||||||
| SOA | grdns.ics.forth.grhmaster-info@ics.forth.gr serial=2606201591 | ||||||
Subdomains
mail.course.gr |
Same first word
Similar names
DNS History
12 records (5 active, 7 former)
○NSns1.sedoparking.com2015-06-24 → 2017-01-09 · 4 obs
● 2017-01-09 00:23:28
○ 2020-12-11 20:37:02
○ 2026-06-20 19:47:50
○NSns2.sedoparking.com2015-06-24 → 2017-01-09 · 4 obs
● 2017-01-09 00:23:28
○ 2020-12-11 20:37:02
○ 2026-06-20 19:47:50
●NSns305.grserver.gr2020-12-11 → 2026-06-20 · 3 obs
● 2020-12-11 20:37:02
● 2026-06-20 19:47:50
●NSns306.grserver.gr2020-12-11 → 2026-06-20 · 3 obs
● 2020-12-11 20:37:02
● 2026-06-20 19:47:50
○MXlocalhost2017-01-09 → 2017-01-09 · 4 obs
● 2017-01-09 00:23:28
○ 2020-12-11 20:37:02
○ 2026-06-20 19:47:50
●MXmail.course.gr2020-12-11 → 2026-06-20 · 3 obs
● 2020-12-11 20:37:02
● 2026-06-20 19:47:50
○MXmail.nickstel.com2015-06-24 → 2016-04-21 · 4 obs
● 2016-04-21 00:53:38
○ 2017-01-09 00:23:28
○ 2026-06-20 19:47:50
○A185.138.42.922020-12-11 → 2020-12-11 · 4 obs
● 2020-12-11 20:37:02
○ 2026-06-09 08:34:20
○ 2026-06-20 19:47:50
●A213.158.90.2352026-06-09 → 2026-06-20 · 3 obs
● 2026-06-09 08:34:20
● 2026-06-20 19:47:50
●A2a00:1c98:1010:1::e52026-06-09 → 2026-06-20 · 3 obs
● 2026-06-09 08:34:20
● 2026-06-20 19:47:50
○A2a02:c500:1:128::12020-12-11 → 2020-12-11 · 4 obs
● 2020-12-11 20:37:02
○ 2026-06-09 08:34:20
○ 2026-06-20 19:47:50
○A72.52.4.912015-06-24 → 2017-01-09 · 4 obs
● 2017-01-09 00:23:28
○ 2020-12-11 20:37:02
○ 2026-06-20 19:47:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| gr | gr-c.ics.forth.gr, gr-d.ics.forth.gr, gr-m.ics.forth.gr, estia.ics.forth.gr... | - |
| course.gr | ns306.grserver.gr, ns305.grserver.gr | - |
✅ Authoritative Response
Server:213.158.90.235
NS records: ns306.grserver.gr, ns305.grserver.gr
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for course.gr (unsigned zone)
⏱️ Timing
Total: 1737ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 213.158.90.235 |
| AAAA | 1 | 2a00:1c98:1010:1::e5 |
| NS | 2 | ns306.grserver.gr, ns305.grserver.gr |
| MX | 1 | mail.course.gr (pri: 10) |
| TXT | 1 | v=spf1 +a +mx include:_spf.fastmail.gr + |
| SOA | 1 | ns306.grserver.gr hostmaster.grserver.gr |
Analysis
Hierarchy
mail.course.gr is delegated beneath course.gr.
IP Addresses
course.gr has two IP addresses: 213.158.90.235 and 2a00:1c98:1010:1::e5
Among the host names that share IP numbers with course.gr are mail.edusmart.gr, mail.osa.gr, hillathens.gr and two others.
Name Servers
course.gr uses two name servers for its delegation: ns305.grserver.gr and ns306.grserver.gr.
course.gr has the same name server delegation as a number of other domains, such as observe.gr, mint.gr, athenstransfers.gr and two more.
There is at least partial name server overlap between course.gr and other domains — enjoylegal.gr, vikar.gr, heartmadecrochet.gr and two more among them.
These name servers tend to appear in combination with the name servers ns117.grserver.gr, ns118.grserver.gr, ns32071.grserver.gr and ns32072.grserver.gr.
ns305.grserver.gr and ns306.grserver.gr share the same two IP addresses — 213.158.90.235 and 2a00:1c98:1010:1::e5.
Both ns305.grserver.gr and ns306.grserver.gr resolve to 2a00:1c98:1010:1::e5 IP addresses each.
Both ns305.grserver.gr and ns306.grserver.gr resolve to 213.158.90.235 IP addresses each.
Mail Servers
course.gr routes its mail through a single mail server, mail.course.gr.
mail.course.gr carries two IP numbers: 213.158.90.235 and 2a00:1c98:1010:1::e5.