altn.com

Checked 22 October 2026, 07:43 UTC · via 8.8.8.8
✗Problems found
22 passed 2 warnings 1 failed 6 info

Registration

info

.com generic · Network Solutions, LLC · expires 2027-11-19

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Network Solutions, LLC
Registered
20 November 1996
Last changed
20 September 2026
Expires
19 November 2027
Status
client transfer prohibited
Registry nameservers
dns1.altn.com, dns2.altn.com
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 2027-11-19 #3
    The registration is valid until 2027-11-19 (392 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

fail

dns1.altn.com, dns2.altn.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns1.altn.com, dns2.altn.com
NS in the zone
dns1.altn.com, dns2.altn.com, ec2amaz-cbir0nl
NameserverAddressesNetwork (AS)Glue
dns1.altn.com44.206.182.14AS16509 AMAZON-02 - Amazon.com, Inc., US44.206.182.14
dns2.altn.com54.146.171.8AS16509 AMAZON-02 - Amazon.com, Inc., US54.146.171.8
ec2amaz-cbir0nl (zone only)(does not resolve)-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.altn.com, dns2.altn.com.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ec2amaz-cbir0nl. dns1.altn.com, dns2.altn.com report NS dns1.altn.com dns2.altn.com ec2amaz-cbir0nl.
    #7
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: dns1.altn.com, dns2.altn.com.
  • ✗
    Nameserver names don't resolve
    These nameservers have no A or AAAA record, so they can't be reached (lame delegation): ec2amaz-cbir0nl.
    #9
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 2 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 .com
    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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: dns1.altn.com, dns2.altn.com.
    #13

Nameservers

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.altn.com 44.206.182.14NOERROR, 97 ms, authoritativenoyes / yesrefused-
dns2.altn.com 54.146.171.8NOERROR, 98 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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

pass

serial 2022102341 · primary dns1.altn.com

Found

Primary (MNAME)
dns1.altn.com
Contact (RNAME)
admin.altn.com
Serial
2022102341
Refresh / retry
3600 s / 900 s
Expire
604800 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
dns1.altn.com (44.206.182.14)2022102341
dns2.altn.com (54.146.171.8)2022102341

Checks

  • ✓ Serial 2022102341 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 15m, expire 7d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.altn.com is one of the listed nameservers.
  • ✓ Contact admin@altn.com #25
    The SOA RNAME admin.altn.com means admin@altn.com.
  • ✓ Date-based serial #26
    The serial 2022102341 follows the YYYYMMDDnn convention (2022-10-23).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

20 records at the apex

Found

Read from
44.206.182.14:53
TypeValueTTL
SOAdns1.altn.com. admin.altn.com. 2022102341 3600 900 604800 900900
NSec2amaz-cbir0nl.900
NSdns2.altn.com.3600
NSdns1.altn.com.3600
A23.227.38.653600
MX10 sg.mdaemon.com.3600
MX20 smtp1.altn.com.3600
TXT"globalsign-domain-verification=2ADC30DB2317421EFC4C958EE1181C40"900
TXT"globalsign-domain-verification=9D5D8FBE8367582B3ABD6C86EC419215"900
TXT"globalsign-domain-verification=A2759C2468D2ACBEFCBB28EC5C4F7708"900
TXT"B788FBE11CEDC5032C4460CD953DD180"900
TXT"globalsign-domain-verification=43005595D47060C17741035459DD265F"900
TXT"globalsign-domain-verification=577A0A534681B95E8045EC0A7427F8C9"900
TXT"globalsign-domain-verification=4A6B556460C1E6C2C3F605BFB08318C3"900
TXT"_8fo9715kff5kyagbvzxjmc8sfs8mhy5"900
TXT"3pj9iio.impervadns.net"3600
TXT"v-spf1 mx -all"3600
TXT"globalsign-domain-verification=23B36457021AAA8533B0E5FECB9B3FC1"900
TXT"_w70e228vkj5cwf356b255hyh9s6lo4r"900
TXT"google-site-verification=CMtopCbBwJqG-XedVFin4UnlXwXPyP_DuX2wsJ7IMnQ"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 15m. The NS TTL at the parent is 2d and in the zone 15m; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35