sif.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 6 December 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 81.95.249.247 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by sif-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 81.95.249.247 | 3600s | dw10-d003.dw-mgmt.lan | AS48854 | team.blue Denmark A/S | 81.95.240.0/20 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.154.152 |
| 🔶 Autoconfig | sif.dw10.dynamicweb-cms.com → 81.95.249.247 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| 4cm7n5if58v1pnhdimagnfn6sa |
| apple-domain-verification=kow6oFk9oFJfU5hp |
| v=spf1 ip4:194.255.17.241 ip4:178.23.241.246 ip4:94.137.136.148 ip4:5.103.118.218 ip4:2.106.123.214 ip4:62.116.219.82/28 ip4:94.137.140.80/28 ip4:94.137.140.85 include:spf.protection.outlook.com include:spf-eu.emailsignatures365.com include:spf.hostnordic.com -all |
| Policy | Record (sif.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:194.255.17.241 ip4:178.23.241.246 ip4:94.137.136.148 ip4:5.103.118.218 ip4:2.106.123.214 ip4:62.116.219.82/28 ip4:94.137.140.80/28 ip4:94.137.140.85 include:spf.protection.outlook.com include:spf-eu.emailsignatures365.com include:spf.hostnordic.com -all |
| www CNAME | sif.dw10.dynamicweb-cms.com (all on dynamicweb-cms.com) → 81.95.249.247 (AS48854) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u18691253.wl004.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u18691253.wl004.sendgrid.net | RSA · ~1024 bit below 2048 bit |
| selector1 | selector1-sif-dk._domainkey.siferas.onmicrosoft.com | RSA · ~1024 bit below 2048 bit |
| selector2 | selector2-sif-dk._domainkey.siferas.onmicrosoft.com | 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.sif.dk | sif.dw10.dynamicweb-cms.com |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101201 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 1996-12-06 |
| Expires | 2027-04-30 (194d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 14:00:38 | 1413ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-13 10:45:24 shown | 2515ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-29 21:26:42 | 1034ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-22 00:34:58 | 1791ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-03 16:36:04 | 1359ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 10:29:55 | 1069ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 16:43:28 | 2402ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 13:28:27 | 1187ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 04:23:39 | 687ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 06:52:31 | 1119ms | 2 NS 1 A 1 MX | 🔒 Secure |