back.dk - dns.ninja
back.dk
dk
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | b.nic.dk ⭐ | ||||||
| NS | c.nic.dk | ||||||
| NS | h.nic.dk | ||||||
| NS | l.nic.dk | ||||||
| NS | s.nic.dk | ||||||
| NS | t.nic.dk | ||||||
| TXT | DK zone updateEpoch 1781368381localtime Sat Jun 13 18:33:01 2026gmtime Sat Ju... | ||||||
| SOA | b.nic.dktech@punktum.dk serial=1781368381 | ||||||
Same first word
Similar names
DNS History
18 records (9 active, 9 former)
○NSns1.gratisdns.dk2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
●NSns1.simply.com2026-02-16 → 2026-06-13 · 3 obs
● 2026-02-16 09:01:34
● 2026-06-13 17:04:06
○NSns2.gratisdns.dk2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
●NSns2.simply.com2026-02-16 → 2026-06-13 · 3 obs
● 2026-02-16 09:01:34
● 2026-06-13 17:04:06
○NSns3.gratisdns.dk2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
●NSns3.simply.com2026-02-16 → 2026-06-13 · 3 obs
● 2026-02-16 09:01:34
● 2026-06-13 17:04:06
○NSns4.gratisdns.dk2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
●NSns4.simply.com2026-02-16 → 2026-06-13 · 3 obs
● 2026-02-16 09:01:34
● 2026-06-13 17:04:06
○NSns5.gratisdns.dk2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
●MXalt1.aspmx.l.google.com2015-08-24 → 2026-06-13 · 2 obs
● 2026-06-13 17:04:06
●MXalt2.aspmx.l.google.com2015-08-24 → 2026-06-13 · 2 obs
● 2026-06-13 17:04:06
●MXalt3.aspmx.l.google.com2026-02-16 → 2026-06-13 · 3 obs
● 2026-02-16 09:01:34
● 2026-06-13 17:04:06
●MXalt4.aspmx.l.google.com2026-02-16 → 2026-06-13 · 3 obs
● 2026-02-16 09:01:34
● 2026-06-13 17:04:06
●MXaspmx.l.google.com2015-08-24 → 2026-06-13 · 2 obs
● 2026-06-13 17:04:06
○MXaspmx2.googlemail.com2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
○MXaspmx3.googlemail.com2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
○MXaspmx4.googlemail.com2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
○MXaspmx5.googlemail.com2015-08-24 → 2017-05-17 · 4 obs
● 2017-05-17 12:49:22
○ 2026-02-16 09:01:34
○ 2026-06-13 17:04:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| dk | b.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk... | - |
| back.dk | ns1.simply.com, ns2.simply.com, ns3.simply.com, ns4.simply.com | - |
✅ Authoritative Response
Server:91.197.248.80
NS records: ns1.simply.com, ns2.simply.com, ns3.simply.com, ns4.simply.com
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 946ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns4.simply.com, ns2.simply.com... |
| MX | 5 | alt1.aspmx.l.google.com (pri: 5), alt4.aspmx.l.google.com (pri: 10)... |
| TXT | 1 | v=spf1 include:_spf.google.com include:s |
| SOA | 1 | ns1.simply.com hostmaster.simply.com |
Analysis
Name Servers
back.dk is delegated to four name servers, ns1.simply.com, ns2.simply.com, ns3.simply.com and ns4.simply.com.
back.dk has at least partial name server overlap with other domains, such as a-cell.se, nelmark.dk, bionor.no and two others.
Host names pointing to two IP addresses:
ns1.simply.com points to 91.197.248.78 and 2a02:2339:1:15c::4562:4562.
ns2.simply.com points to 185.25.141.15 and 2a02:2339:4006:101::4562:4562.
Host names with one IP number:
ns3.simply.com points to 91.197.248.79.
ns4.simply.com points to 91.197.248.80.
Mail Servers
back.dk is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.
At least some of the mail servers used by back.dk are shared with other domains: punchlistzero.com, ns500754.ns500742.ns500754.ns500754.ns500671.ns500704.ns500671.ns500704.ns500704.ns500705.ns500688.ns500688.ns500688.ns500678.ns500666.ns500653.ns500153.tenderladiesbz.com, ns500758.ns500758.ns500759.ns500758.ns500735.ns500736.ns500735.ns500735.ns500698.ns500576.ns500698.ns500708.ns500619.ns500652.ns500619.trackreceptor.com and two others among them.
These mail servers often appear in conjunction with the mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and aspmx3.googlemail.com.
Host names pointing to two IP addresses:
aspmx.l.google.com points to 172.253.139.26 and 2607:f8b0:4004:c06::1a.
alt1.aspmx.l.google.com points to 108.177.123.27 and 2800:3f0:4003:c0f::1a.
alt2.aspmx.l.google.com points to 172.253.116.26 and 2a00:1450:400b:c02::1a.
alt3.aspmx.l.google.com points to 192.178.223.27 and 2a00:1450:4009:c0f::1b.
alt4.aspmx.l.google.com points to 172.253.157.27 and 2a00:1450:400c:c23::1a.