kpn.com

Checked 22 October 2026, 09:32 UTC · via 8.8.8.8
!Passed with warnings
28 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · Tucows Domains Inc. · expires 2026-12-18

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Tucows Domains Inc.
Registered
19 December 1994
Last changed
19 November 2025
Expires
18 December 2026
Status
client transfer prohibited, client update prohibited
Registry nameservers
ns1.kpn.net, ns11.kpn.net
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2026-12-18 #3
    The registration is valid until 2026-12-18 (56 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns1.kpn.net, ns11.kpn.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.kpn.net, ns11.kpn.net
NS in the zone
ns1.kpn.net, ns11.kpn.net
NameserverAddressesNetwork (AS)Glue
ns1.kpn.net194.151.228.10 2a02:a47f:ac:1::153AS1136 KPN - KPN B.V., NL AS1136 KPN - KPN B.V., NL-
ns11.kpn.net213.75.63.33 2a02:a47f:ac:1::1153AS1136 KPN - KPN B.V., NL AS1136 KPN - KPN B.V., NL-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.kpn.net, ns11.kpn.net.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • i
    One address family in one network
    all IPv6 addresses are in 2a02:a47f:ac::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1136 (KPN - KPN B.V., NL): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .net
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.kpn.net 194.151.228.10NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns1.kpn.net 2a02:a47f:ac:1::153NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns11.kpn.net 213.75.63.33NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns11.kpn.net 2a02:a47f:ac:1::1153NOERROR, 10 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2026102201 · primary ns1.kpn.net

Found

Primary (MNAME)
ns1.kpn.net
Contact (RNAME)
zonemaster.kpn.com
Serial
2026102201
Refresh / retry
300 s / 30 s
Expire
172800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.kpn.net (194.151.228.10)2026102201
ns1.kpn.net (2a02:a47f:ac:1::153)2026102201
ns11.kpn.net (213.75.63.33)2026102201
ns11.kpn.net (2a02:a47f:ac:1::1153)2026102201

Checks

  • ✓ Serial 2026102201 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 5m is outside 20m–1d; expire 2d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 5m, retry 30s, expire 2d, negative TTL 5m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.kpn.net is one of the listed nameservers.
  • ✓ Contact zonemaster@kpn.com #25
    The SOA RNAME zonemaster.kpn.com means zonemaster@kpn.com.
  • ✓ Date-based serial #26
    The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
40959ECDSAP256SHA256 (13)SHA256 5E54399A18C837D8…yes

DNSKEY in the zone

Key tagRoleAlgorithm
54661ZSK (256)ECDSAP256SHA256 (13)
40959KSK (257)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 40959 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-11-05 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-05 00:00 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

warn

83 records at the apex

Found

Read from
194.151.228.10:53
TypeValueTTL
SOAns1.kpn.net. zonemaster.kpn.com. 2026102201 300 30 172800 3003600
NSns11.kpn.net.3600
NSns1.kpn.net.3600
A75.2.72.20460
A99.83.136.15560
AAAA2600:9000:a400:dede:1a1c:a23f:9ae6:7bbc3600
AAAA2600:9000:a504:9080:40c0:d138:ca59:2e3d3600
MX0 kpn-com.i-v1.mx.microsoft.60
TXT"pWxQA8qJDk9FOZXlrljPxID0E8PGUHI24FPDwHvNOymQgbRsDplofmA55oxuN0KG"3600
TXT"_yyfnf3y3uu3kesxxg6inrudhvmus269"3600
TXT"pardot863842=d8565bc8fb6bfe887ef4c2895ffb45d9d36d76a169ff4c0d57bb53a36a019864"3600
TXT"euWmbfNhn9Ps3GmErPecfxWLaZVmTgEsjl4j89J03DfaLKqP7vsd9RmotSI6vtJG"3600
TXT"urzedwXSa1cQCuxb7fEt2sBbVl4mmBQghWdPGjrGvNjMF9DgAB6TbHcqMCAz0N0r"3600
TXT"7sBNoAEjPHRDRizm85GcZlz2BrI8FFFk9UEYxTEk55KxMpTQLZPPmkXHTlU5gkDX"3600
TXT"apple-domain-verification=Z7SP4QKg6NHaVO1Z"3600
TXT"docusign=7a9f2942-9833-4821-aec9-543f0d9a535f"3600
TXT"nNqfdfjNAfFzmmK7uH4OSMZfE9h5PlD9CAmJgwFde8ZpDvIkhSGGxdN3UIj4AWVd"3600
TXT"google-site-verification=ACbCFC6KOsD0bBR3t4xWwucRNs1c-ec62wH4Jeo5xWQ"3600
TXT"google-site-verification=MpEtLxmUTXjyIUYDEuhP1lD4osj0HlfG0YUewfimoyA"3600
TXT"apple-domain-verification=iBU3LjBt6LXVeNrW5JfIlpkW5YqxszH9MS8uRnSjsXs"3600
TXT"KUBrNtncIi5R69h7KkmNquRxugEpMxEncMrYVLK4TgKDKVGNedYlUjkgcgQA33yT"3600
TXT"AUz3i9hbktVYJXVXCjRmOIS8yYbF8lS5gkmNh9tEDvXVWcWxkDcNAR59UKGouafA"3600
TXT"00D30000000oQac=1TBTd00000000Kz"3600
TXT"onetrust-domain-verification=14142ac169f84c4284a2bd6318218fe7"3600
TXT"elevenlabs=7Z3aoJS6snTrfftNSnZS284dl3kfA5mcYtEF5xSpeOE"3600
TXT"NPUo4zyqgeZnNTxyhn0OGq47cl3WFs7BPkIHJ5e7uVG6WU0w9KeVS9X1bWlH3E37"3600
TXT"pardot892761=d076a51e90666dfaaa5e9ca876e30d6e05c7cfeac2cf686bd0f3de27797394af"3600
TXT"uxd57JmeFxoOTrrQfvri7SMlqzD6TrFNfOOg8uV8Jx4iFRg70pE7pwoU8Q01b43U"3600
TXT"_32pc0mw08dyf97ogca8z8t3oiuajvkd"3600
TXT"U738oQHv1Q9HNsGz6njwROpOM2szh2erYHQ2rSfmGXD4TvI08A7nQAeH8uGFRVWZ"3600
TXT"VHtbjkd3YeqQSrilTmRMwrMtDZi0HLqVbWq7E3bKH4bYmpap3RvzdhmAHLl27DX0"3600
TXT"00Dds000002GWnZ=1TBds0000000ADt"3600
TXT"hCY3aL5CUBiLlYNNBiOkdoZAKtVwcXUVEoR4Jp9ZwwYVzisgq3j4uOI37UymJYyz"3600
TXT"qHxBDLaRhLvmS49pj3n4tXAAtbJvaWWCblUpxN3Euu0lijcwwCKHfcFTSh8NI8us"3600
TXT"d365mktkey=IgyJJZcagEZMSckzP9AizxlreJeFfcvljOLezZ1gh3Ix"3600
TXT"gROyReFQxYOf3LSKx50ds7pF6mF3JeigKZjhMADDGEoa5btGxFKP4QlleuABtX7i"3600
TXT"00DRR00000N7c1y=1TBRR0000000B57"3600
TXT"GdLA3ueRJ2hiLuaTRFZIxmSTHqkVsHvHF3UyiIPtoi12BGNusQycjuDoD7wvcJzp"3600
TXT"aevShr9sP3YLx0QKSION4AdYQocnlFq63tN72qyPbF8eh07BClGXUnc2CIgD8yxR"3600
TXT"sending_domain892761=d9b3bc70a2ad775c9501123cad1861d25adc7d673a9f1e910b04ea76a8f51be6"3600
TXT"UoN6VFlfJSzaxz347cg0i2wnBuGgmW1JoC24pxJ6JNYjayOiaNA9PTRwTuljClY0"3600
TXT"browserstack-domain-verification=c7434e93-1d8e-481e-9e76-1c03083057e7"3600
TXT"ndQuDEhu9x1xFvA6jOrCLgOsDpEcpegMG6zh5H9HiERukr2gMLxuqMC2CvF4RxhO"3600
TXT"00DUC0000065XXz=1TBUC0000000Lyv"3600
TXT"sending_domain863842=0aabfcc9132f59757d0053c22752e9b82d0fad2cae9387575e68093b26c1b9e6"3600
TXT"astro-domain-verification=cmh35dtke05cm01maik5sh3hm"3600
TXT"figma-domain-verification=baaa88dc21cd82557a5c133781b2dff0281f54f1c64f75ad7f497f79a83467f6-1755611702"3600
TXT"Yb1450kauMksXWJzXlNba8ncgHkRX4NtzayfzEfR6nose3iLvx8b8XffSkU2b9D5"3600
TXT"atlassian-domain-verification=h/BZz9Pv7Jleyl0qqKu8yaj3/xz1jgRaG6YlJPdlJ9iael84jExA4TL24qG6fTiP"3600
TXT"ViYJp9NlDtotbhOlXjbIZwvuZWBebK8oWUpQBsBSwSSy0JrLQrjSCtmVfAWASUJA"3600
TXT"hYVk8Wr9FOuzAMKSQMIfbeajDzwmQ6GCqkVUyxG6tt08mnKQzkI5CbhUytGX39K7"3600
TXT"v=spf1 include:spf.safemail.kpn.com ~all"3600
TXT"uXfEh50uN0yu5qkzoUXCAy9jErhix5xk20QhIc8ASOCEcIQvg1G7rLfaovWO0FOO"3600
TXT"Y58oahimn9wLp9v6H6lkUk8bc4cNqN8HXuiqqpFAA6krqm9i0AYocmvb8jbz5q6m"3600
TXT"00D0Y0000034w37=1TBTe00000001tm"3600
TXT"pardot977453=8455bd6813e854172afadfc4d97087449546f7fcd09ef50b38848a476cf74a4e"3600
TXT"PURvN56uP49A6pveirCqJOm5AJdYs9zU1XBbE4zuRv3WIjLTlADumQsqD6ugcEpQ"3600
TXT"_t8xxbr0fquamqm1rojv1awoisu07k74 "3600
TXT"mongodb-site-verification=dUpWuHpGKDBaCzaMCUV3GbxGBRgQc6dE"3600
TXT"apple-domain-verification=RIjwUQHiCFvUgkg0-low88dutI4bWl4Jazco6oVk8pw"3600
TXT"airtable-verification=23acd19b9067690a95d91bbe2c84f7f7"3600
TXT"google-site-verification=XGZ6tTJCSYHEyLTMJXHvmNAzps-rI-PAc9tvHephj_w"3600
TXT"00Dds000002K30f=1TBds00000008gj"3600
TXT"juGkLK6em7kLak50WZ0elq4pyK-qD2eSHkowe2CvY_I"3600
TXT"rt6kl9FsRxC9J46cX3aPxDLmkmSBpuAZ3mDx9ff4HBdI6S4H8FNaWofKPYVKCgsT"3600
TXT"facebook-domain-verification=oe3z2excnmn0my3ayl1i0nqi26nrzi"3600
TXT"sending_domain977453=23b325b444874fca17cd7735a47951abac5e34771a61ae473c3c62b8c8a7f2cf"3600
TXT"ZoMNBQezdvNT1fsvTUtgxpSL1UDizoKWPdEweeap2Z0xxsa5PE6LSlC1jq7bfYw3"3600
TXT"26wWHhlyDNNjPftjnezf2pRhhisotMt1PQ7stJK30bvlo6qbVLrk7qsimYkb5Ozs"3600
CAA0 issue "certsign.ro"3600
CAA0 issuewild "amazonaws.com"3600
CAA0 issuewild "digicert.com"3600
CAA0 iodef "mailto:abuse@kpn.com"3600
CAA0 issue "amazonaws.com"3600
CAA0 issue "globalsign.com"3600
CAA0 issue "letsencrypt.org"3600
CAA0 issue "digicert.com"3600
CAA0 issue "pki.goog"3600
CAA0 issue "sectigo.com"3600
CAA0 issue "kpn.com"3600
CAA0 issuewild "globalsign.com"3600
CAA0 issuewild "certSIGN.ro"3600
CAA0 issuewild "sectigo.com"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1h; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: certsign.ro, amazonaws.com, digicert.com, globalsign.com, letsencrypt.org, pki.goog, sectigo.com, kpn.com, certSIGN.ro.