🧮 NSEC3 & CDS

Authenticated denial (NSEC vs NSEC3), RFC 9276 iteration compliance and automated key rollover (CDS/CDNSKEY) · all insights

Signed zones prove that a name does not exist with NSEC or NSEC3 records. RFC 9276 recommends NSEC3 with zero extra iterations and no salt; this page measures how many .dk zones follow that, which providers don't, and who publishes CDS/CDNSKEY for automated key rollovers. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.

Based on 73,946 domains probed so far (5.5% of the zone). Our scanners refresh these probes at least every 30 days, so the numbers fill in and settle over the first month.

🧮 NSEC3 iterations

Of 49,454 signed zones probed, 28,194 (57.0%) use NSEC3, 20,122 (40.7%) use a classic NSEC chain, which lets anyone list every name in the zone, and 1,138 (2.3%) use compact denial (RFC 9824, Cloudflare's "black lies"), which can't be walked. RFC 9276 asks NSEC3 zones for 0 extra iterations and no salt: iterations cost resolvers CPU for no security gain. 13,593 NSEC3 zones (48.2%) still use iterations and 13,617 use a salt; 121 use opt-out.

IterationsZonesShare
014,601
51.8%
112,348
43.8%
51
0.0%
7668
2.4%
82
0.0%
10493
1.7%
202
0.0%
212
0.0%
5078
0.3%

List the zones with iterations > 0 →

🏢 NSEC3 by DNS provider

ProviderNSEC3 zonesIterations > 0Salted
one.com13,0360.1%0.0%
dandomain.dk6,464100.0%100.0%
curanet.dk3,066100.0%100.0%
scannet2.dk1,352100.0%100.0%
hyp.net7830%0.0%
wannafind.dk504100.0%100.0%
sitnet.dk390100.0%100.0%
dnsserver.dk384100.0%100.0%
nordicway.dk31465.0%65.0%
e-studio.dk24998.4%98.4%
loopia.se1870%0.0%
123hotel.dk103100.0%100.0%
aveo.dk89100.0%100.0%
netgiganten.dk8197.5%97.5%
gnrx.dk61100.0%100.0%
simpleagencygroup.dk61100.0%100.0%
wixdns.net52100.0%100.0%
hostonline.dk50100.0%100.0%
dnsadmin.dk4885.4%100.0%
yayhosting.dk48100.0%100.0%
azehosting.net4791.5%91.5%
desec.io450%0.0%
eurodns.com410%0.0%
deic.dk350%0.0%
web-solutions.dk350%0.0%

🔄 CDS / CDNSKEY (automated DS updates)

CDS and CDNSKEY records let a DNS operator hand key rollovers to the registry automatically (RFC 7344/8078). 18,254 of 52,090 signed zones (35.0%) publish them; 39 publish the delete signal, asking the registry to remove their DS and turn DNSSEC off.

📋 Zones with NSEC3 iterations > 0

14,618 zones
DomainIterationsSalt
080780.dk11 bytes
0energi.dk11 bytes
1-step-away.dk11 bytes
1-step-up.dk11 bytes
1-utzonplace.dk11 bytes
1001stories.dk1010 bytes
1036.dk78 bytes
10klassecentret.dk508 bytes
110310renovering.dk11 bytes
112akuthjaelper.dk11 bytes
123bazar.dk11 bytes
123visitkort.dk11 bytes
13829.dk11 bytes
14a.dk11 bytes
15-3.dk78 bytes
15septemberfonden.dk11 bytes
17mænd.dk78 bytes
1805.dk78 bytes
18alkohol.dk1011 bytes
1andre.dk11 bytes
1apo.dk11 bytes
1bach.dk11 bytes
1kid.dk11 bytes
1moore.dk11 bytes
1shot.dk78 bytes
1sl.dk78 bytes
20100030.dk78 bytes
20111610.dk11 bytes
20241515.dk11 bytes
2025denmark.dk1012 bytes
22100200.dk11 bytes
22223333.dk11 bytes
247-laaseservice.dk11 bytes
24timersloeb.dk11 bytes
262.dk11 bytes
26222299.dk78 bytes
2770.dk11 bytes
2assist.dk11 bytes
2b-business.dk11 bytes
2cv-experten.dk11 bytes
2dohost.dk11 bytes
2embrace.dk11 bytes
2field.dk11 bytes
2helpu.dk11 bytes
2m2.dk11 bytes
2mdata.dk11 bytes
2ndtonone.dk11 bytes
2note.dk11 bytes
2od.dk11 bytes
2peter.dk11 bytes
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