holtgrefe.info - robtex.com
holtgrefe.info
info
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.info.afilias-nst.info ⭐ | ||||||
| NS | a2.info.afilias-nst.info | ||||||
| NS | b0.info.afilias-nst.org ⚠️ Not in parent delegation | ||||||
| NS | b2.info.afilias-nst.org ⚠️ Not in parent delegation | ||||||
| NS | c0.info.afilias-nst.info | ||||||
| NS | d0.info.afilias-nst.org ⚠️ Not in parent delegation | ||||||
| SOA | a0.info.afilias-nst.infohostmaster@donuts.email serial=1785472364 | ||||||
Subdomains
mail.holtgrefe.info |
Same first word
holtgrefe.nl |
holtgrefe.info |
holtgrefe.name |
Similar names
thegolfer.com.au |
thegolfer.de |
thegolfer.net |
golfthere.net |
thegolfer.club |
gothelfre.com |
erthegolf.com |
thegolfer.co.uk |
golfthere.com |
golfthree.com |
thereflog.com |
DNS History
8 records (7 active, 1 former)
●MXfilter10.antispamcloud.com2026-06-14 → 2026-07-31 · 3 obs
● 2026-06-14 19:34:36
● 2026-07-31 05:05:38
●MXfilter20.antispamcloud.com2026-06-14 → 2026-07-31 · 3 obs
● 2026-06-14 19:34:36
● 2026-07-31 05:05:38
●MXfilter30.antispamcloud.com2026-06-14 → 2026-07-31 · 3 obs
● 2026-06-14 19:34:36
● 2026-07-31 05:05:38
●MXfilter40.antispamcloud.com2026-06-14 → 2026-07-31 · 3 obs
● 2026-06-14 19:34:36
● 2026-07-31 05:05:38
○MXmail.holtgrefe.info2015-06-11 → 2017-05-29 · 4 obs
● 2017-05-29 11:47:12
○ 2026-06-14 19:34:36
○ 2026-07-31 05:05:38
●A37.247.39.1512015-06-11 → 2026-07-31 · 2 obs
● 2026-07-31 05:05:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| info | a0.info.afilias-nst.info, a2.info.afilias-nst.info, c0.info.afilias-nst.info | - |
| holtgrefe.info | ns2.tofko.nl, ns1.tofko.nl | - |
✅ Authoritative Response
Server:5.9.1.88
NS records: ns2.tofko.nl, ns1.tofko.nl
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 837ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.247.39.151 |
| NS | 2 | ns2.tofko.nl, ns1.tofko.nl |
| MX | 4 | filter30.antispamcloud.com (pri: 30), filter10.antispamcloud.com (pri: 10)... |
| TXT | 1 | v=spf1 a mx ip4:37.247.39.151 ~all |
| SOA | 1 | ns1.tofko.nl root.holtgrefe.info |
Analysis
Hierarchy
The domain mail.holtgrefe.info falls under the parent holtgrefe.info.
IP Addresses
holtgrefe.info directs to one IP number, which is 37.247.39.151.
Among the host names that share IP numbers with holtgrefe.info are pavadita.nl, progenia.nl, parasound.co.uk and two others.
Name Servers
Two name servers handle the delegation for holtgrefe.info: ns1.tofko.nl and ns2.tofko.nl.
holtgrefe.info has the same name server delegation as a number of other domains, such as marcelvos.net, almgaard.nl, avemea.nl and two more.
holtgrefe.info is at least partially co-delegated on name servers with other domains, such as franktimmermans.nl.
These name servers tend to be deployed in combination with the name servers ns1.tofco.nl and ns2.tofco.nl.
Each of ns1.tofko.nl and ns2.tofko.nl has one IP address: ns1.tofko.nl uses 37.247.39.151 and ns2.tofko.nl uses 5.9.1.88.
Mail Servers
The four mail servers for holtgrefe.info are filter10.antispamcloud.com, filter20.antispamcloud.com, filter30.antispamcloud.com and filter40.antispamcloud.com.
holtgrefe.info shares at least some of its mail servers with other domains — for example lentingbouw.nl, drkgeislingen.de, auditprogroup.com and two more.
Two of the four hostnames share an address pair: filter10.antispamcloud.com and filter40.antispamcloud.com both resolve to 38.101.250.150 and 2001:550:2:78::ca:100. The remaining hosts resolve to distinct addresses: filter20.antispamcloud.com resolves to 38.89.254.156 and 2001:550:2:61::2fc:100, and filter30.antispamcloud.com resolves to 38.71.16.244 and 2001:550:2:3::62:100.
filter10.antispamcloud.com along with filter40.antispamcloud.com each resolve to 2001:550:2:78::ca:100 IP addresses.
filter10.antispamcloud.com along with filter40.antispamcloud.com each resolve to 38.101.250.150 IP addresses.