silvaco.dk is a .dk domain served by 2 nameservers (jake.ns.cloudflare.com, riya.ns.cloudflare.com). It was registered on 16 February 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. On 24 October 2026 we saw it transfer from Simply.com A/S to dns.services ApS. Its website address 104.21.40.60 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by silvaco-dk.mail.protection.outlook.com. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.40.60 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.178.9 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::ac43:b209 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::6815:283c | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.40.60,172.67.178.9 ech=AEX+DQBBBAAgACBusZqyaRJuh8p+JunhuQ33Y82VHLXrIzBEfhWt0jFPLQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:b209,2606:4700:3034::6815:283c |
| TXT Record |
|---|
| MS=ms89534473 |
| v=spf1 -all |
| Policy | Record (silvaco.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.silvaco.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | 104.21.40.60 172.67.178.9 2606:4700:3033::ac43:b209 2606:4700:3034::6815:283c (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 0/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2418245829 |
| Primary NS (MNAME) | jake.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | dns.services ApS |
| Registered | 1998-02-16 |
| Expires | 2027-03-31 (158d) |
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 |
|---|---|
| bytiq.dk | Simply.com A/S |
| minblomstgilleleje.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-24 03:06:30 shown | 2191ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-13 00:59:25 | 1241ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-08 12:04:02 | 1072ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 00:27:53 | 1114ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 23:17:31 | 647ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-10 22:06:38 | 1537ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 05:05:47 | 951ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 08:20:48 | 1022ms | 4 NS 1 A 1 MX | 🔒 Secure |