Domain report: sri.com

Registration

info

.com generic · Network Solutions, LLC · expires 2035-01-18

Found

TLD: .com (generic)
ICANN policies apply: yes
Registrar: Network Solutions, LLC
Registered: 17 January 1986
Last changed: 31 October 2025
Expires: 18 January 2035
Status: client transfer prohibited
Registry nameservers: mpns1.sri.com, pnjns1.sri.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 2035-01-18 #3

The registration is valid until 2035-01-18 (3009 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

warn

mpns1.sri.com, pnjns1.sri.com

Found

Parent zone: com
Delegation from: a.gtld-servers.net (192.5.6.30)
NS at the parent: mpns1.sri.com, pnjns1.sri.com
NS in the zone: mpns1.sri.com, pnjns1.sri.com

Nameserver	Addresses	Network (AS)	Glue
mpns1.sri.com	128.18.243.68	AS264 SRINET-AS - SRI International, US	128.18.243.68
pnjns1.sri.com	128.57.93.4	AS264 SRINET-AS - SRI International, US	128.57.93.4

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: mpns1.sri.com, pnjns1.sri.com.

#6
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
✓ Glue present and correct #8

Glue is published for the nameservers inside the zone: mpns1.sri.com, pnjns1.sri.com.
✓ 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.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS264 (SRINET-AS - SRI International, 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
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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

Nameservers

pass

2 of 2 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
mpns1.sri.com 128.18.243.68	NOERROR, 146 ms, authoritative	no	yes / yes	refused	-
pnjns1.sri.com 128.57.93.4	NOERROR, 105 ms, authoritative	no	yes / yes	refused	-

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 196946 · primary mpns1.sri.com

Found

Primary (MNAME): mpns1.sri.com
Contact (RNAME): helpdesk.sri.com
Serial: 196946
Refresh / retry: 10800 s / 1080 s
Expire: 2419200 s
Negative TTL: 900 s

Serial per nameserver

Nameserver	Serial
mpns1.sri.com (128.18.243.68)	196946
pnjns1.sri.com (128.57.93.4)	196946

Checks

✓ Serial 196946 everywhere #22

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

SOA refresh 3h, retry 18m, expire 28d, negative TTL 15m.
✓ Primary is a public nameserver #24

The primary nameserver mpns1.sri.com is one of the listed nameservers.
✓ Contact helpdesk@sri.com #25

The SOA RNAME helpdesk.sri.com means helpdesk@sri.com.
✓ Counter serial #26

The serial 196946 is a plain counter.

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 10 iterations, 14-byte salt
Signatures valid until: 25 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
59176	RSASHA256 (8)	SHA256 9D12796A5F72E65F…	yes
37675	RSASHA256 (8)	SHA256 A5CD6B6A7D33E260…	NO
37675	RSASHA256 (8)	SHA1 C90DB5003622BE62…	NO

DNSKEY in the zone

Key tag	Role	Algorithm
17890	ZSK (256)	RSASHA256 (8)
6328	ZSK (256)	RSASHA256 (8)
25714	ZSK (256)	RSASHA256 (8)
59176	KSK (257)	RSASHA256 (8)

Checks

✓ Signed and validated #27

The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
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Unused DS records

These DS records match no key in the zone: key tag 37675 (SHA256), key tag 37675 (SHA1). That is normal during a key rollover; otherwise remove them.

#28
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Short-lived signatures (online signing) #30

Signatures are valid for 97h0m0s and created on demand; the current one was made at 2026-10-21 18:58 UTC and expires at 2026-10-25 19:46 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 10 iterations and a 14-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.

#31

Records

info

15 records at the apex

Found

Read from: 128.18.243.68:53

Type	Value	TTL
SOA	mpns1.sri.com. helpdesk.sri.com. 196946 10800 1080 2419200 900	3600
NS	pnjns1.sri.com.	3600
NS	mpns1.sri.com.	3600
A	18.190.151.175	900
MX	10 sri-com.mail.protection.office365.us.	3600
TXT	"atlassian-domain-verification=YHqQh6gc8v/A5ZW0ztAo4xYULgUxilZZkoKhKzw0JzC69ESkaFhswl5s3fbP648L"	3600
TXT	"00Dt0000000LBM4=1TBcr00000006wg"	3600
TXT	"IctAERoa5iX+wDRNsFS8CRgswzX+FLaOEq6VZeIkctw1YocVCeoui5a6/JvAl/6ph6bBYauc5aTRaLdKvW26/A=="	3600
TXT	"MS=ms37423611"	3600
TXT	"apple-domain-verification=6Cabocw6bpjLEdoT"	3600
TXT	"v=spf1 include:spf.protection.office365.us include:_spf.salesforce.com include:spf01.sri.com include:spf02.sri.com include:spf05.sri.com include:spf04.sri.com -all"	3600
TXT	"smartsheet-site-validation=7A7vnm1Zx5pD3SsxPfZG3jI7WjwaFu4I"	3600
TXT	"smartsheet-gov-site-validation=8f8AZ93gjtlDquVaFIn2dDmnc9SK_e6W"	3600
TXT	"openai-domain-verification=dv-sBWuL8Az3Y3cIMjULGXpjaYC"	3600
TXT	"_du3hmgb7p77sj9p0zasokyy4eqkzwo7"	3600

Checks

✓ TTLs within range #32

TTLs: A 15m, MX 1h, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; 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