citigroup.dk is a .dk domain served by 2 nameservers (ns1.nsroot1.com, ns2.nsroot2.com). It was registered on 13 April 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.nsroot1.com | 156.154.64.172 | pdns172.ultradns.com | AS12008 Vercara, LLC |
| ns2.nsroot2.com | 193.108.91.190 | a1-190.akam.net | AS21342 Akamai International B.V. |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 165.160.13.20 | 3600s | — | AS19574 | — | — | — | — |
| 165.160.15.20 | 3600s | — | AS19574 | Corporation Service Company | 165.160.12.0/22 | 🇺🇸 United States | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 165.160.13.20 |
| 🔶 Autoconfig | 165.160.15.20 |
| TXT Record |
|---|
| v=spf1 include:spf-00123c01.pphosted.com -all |
| Policy | Record (citigroup.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf-00123c01.pphosted.com -all |
| Policy | Record (_dmarc.citigroup.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc_rua@emaildefense.proofpoint.com,mailto:dmarc.reports.rua@citi.com |
| Flags | Tag | Value |
|---|---|---|
| 128 | iodef | mailto:CAADNS@citi.com |
| 128 | issue | digicert.com |
| 128 | issuewild | ; |
| www | 165.160.13.20 165.160.15.20 (AS19574) (address records, no CNAME) |
| www vs bare domain | Same network citigroup.dk: 165.160.13.20 165.160.15.20 (AS19574) www.citigroup.dk: 165.160.13.20 165.160.15.20 (AS19574) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2021100112 |
| Primary NS (MNAME) | ns1.nsroot1.com |
| Responsible (RNAME) | hostmaster@citi.com |
| Refresh | 3600s |
| Retry | 300s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | MarkMonitor Inc. |
| Registered | 1998-04-13 |
| Expires | 2027-06-30 (255d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Domain | Registrar |
|---|---|
| citibusiness.dk | MarkMonitor Inc. |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-17 17:00:33 | 1971ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-07 19:59:46 | 987ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-03 23:40:46 | 712ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-30 21:59:46 | 833ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-17 23:39:42 | 9530ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-15 20:33:26 | 758ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-14 18:47:15 | 872ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-12 20:50:34 | 9935ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-06 21:33:41 | 8964ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-04 23:22:35 | 1292ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-02 13:06:39 | 9738ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-22 03:14:59 shown | 786ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-20 10:37:23 | 1607ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-19 02:09:34 | 980ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-16 20:55:32 | 444ms | 2 NS 2 A 0 MX | 🔓 Insecure |