lookback.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 21 February 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 3.120.120.3 is hosted by Amazon.com, Inc. (AS16509) in Germany. Mail is handled by mx1.mailserver.darknet.dk, mx2.mailserver.darknet.dk and 1 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 3.120.120.3 | 43200s | enforcer.darknet.dk | AS16509 | Amazon.com, Inc. | 3.96.0.0/11 | 🇩🇪 Germany | Frankfurt am Main |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | lookback.dk → 3.120.120.3 |
| 🔶 Autoconfig | lookback.dk → 3.120.120.3 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a05:d014:dc7:7220::20 | 43200s | enforcer.darknet.dk | AS16509 | Amazon.com, Inc. | 2a05:d000:0:0:0:0:0:0/25 | 🇩🇪 Germany | Frankfurt am Main |
| TXT Record |
|---|
| spf2.0/pra |
| v=spf1 include:_spf.mailserver.darknet.dk -all |
| Policy | Record (lookback.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.mailserver.darknet.dk -all |
| Policy | Record (_dmarc.lookback.dk) |
|---|---|
| p=reject | v=DMARC1; pct=100; p=reject; rua=mailto:dmarc-reports@mailserver.darknet.dk; ruf=mailto:dmarc-reports@mailserver.darknet.dk; fo=1 |
| www CNAME | lookback.dk (all on lookback.dk) |
| www vs bare domain | Same network lookback.dk: 3.120.120.3 2a05:d014:dc7:7220::20 (AS16509) www.lookback.dk: 3.120.120.3 2a05:d014:dc7:7220::20 (AS16509) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | RSA · ~1024 bit below 2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 5/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.lookback.dk | lookback.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100301 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2011-02-21 |
| Expires | 2027-02-28 (127d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-04 02:50:00 shown | 754ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-30 02:28:21 | 680ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-23 08:54:40 | 984ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-07 02:30:12 | 2182ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-22 04:30:36 | 9785ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-15 14:48:20 | 9216ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-07 11:23:35 | 4188ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-03 16:04:46 | 1011ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-01 12:15:43 | 980ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-17 11:34:09 | 1407ms | 2 NS 1 A 3 MX | 🔒 Secure |