Domain report: rackcdn.com

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2026-12-15

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.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 2026-12-15 #3

The registration is valid until 2026-12-15 (53 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.

warn

ns.rackspace.com, ns2.rackspace.com

Nameserver	Addresses	Network (AS)	Glue
ns.rackspace.com	69.20.95.4	AS27357 RACKSPACE - Rackspace Hosting, US	69.20.95.4
ns2.rackspace.com	65.61.188.4	AS33070 RMH-14 - Rackspace Hosting, US	65.61.188.4

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.rackspace.com, ns2.rackspace.com.

#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.
✓ Nameservers in different networks #10

The nameservers are spread over 2 IPv4 /24s and 0 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS27357 (RACKSPACE - Rackspace Hosting, US): 1 address; AS33070 (RMH-14 - Rackspace Hosting, US): 1 address.
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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
!

No IPv6

None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.

#13

pass

2 of 2 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns.rackspace.com 69.20.95.4	NOERROR, 87 ms, authoritative	no	yes / yes	refused	-
ns2.rackspace.com 65.61.188.4	NOERROR, 17 ms, authoritative	no	yes / yes	refused	-

✓ 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.

pass

serial 1787093099 · primary ns.rackspace.com

Nameserver	Serial
ns.rackspace.com (69.20.95.4)	1787093099
ns2.rackspace.com (65.61.188.4)	1787093099

✓ Serial 1787093099 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 1h, retry 5m, expire 21d, negative TTL 5m.
✓ Primary is a public nameserver #24

The primary nameserver ns.rackspace.com is one of the listed nameservers.
✓ Contact hostmaster@rackspace.com #25

The SOA RNAME hostmaster.rackspace.com means hostmaster@rackspace.com.
✓ Timestamp serial #26

The serial 1787093099 is a Unix timestamp (2026-08-18 22:44 UTC).

warn

Not signed

info

6 records at the apex

Type	Value	TTL
SOA	ns.rackspace.com. hostmaster.rackspace.com. 1787093099 3600 300 1814400 300	300
NS	ns2.rackspace.com.	300
NS	ns.rackspace.com.	300
MX	20 mx2.emailsrvr.com.	300
MX	10 mx1.emailsrvr.com.	300
TXT	"_ygn75krgit6lyweywnaq7s4wykn7y1f"	300

✓ TTLs within range #32

TTLs: MX 5m, NS 5m. The NS TTL at the parent is 2d and in the zone 5m; 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.
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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