Dataweaz

sentara.com

Summary

Registrar
MarkMonitor Inc.
Status
clientDeleteProhibited
Created on
April 18, 1994
Expires on
October 31, 2027
Name servers
ns-1607.awsdns-08.co.uk, ns-182.awsdns-22.com, ns-626.awsdns-14.net, ns-1354.awsdns-41.org
Mail servers
mx2.hc4686-63.iphmx.com, mx1.hc4686-63.iphmx.com
DMARC
Reject

Spoofing protection (DMARC)

Reject

E-mails spoofing this domain are rejected.

DMARC tells mail servers what to do with an e-mail that claims to come from sentara.com but fails SPF and DKIM checks.

Policy
Reject
Subdomain policy
Reject
Messages covered
100%
DKIM alignment
Relaxed
SPF alignment
Relaxed
Aggregate reports
[email protected]
Failure reports
[email protected]

Record

v=DMARC1;p=reject;fo=1;rua=mailto:[email protected];ruf=mailto:[email protected]

Authorized senders (SPF)

Strict

E-mails sent by any other server are rejected.

SPF lists the servers allowed to send e-mails for sentara.com.

RuleValueResult
ip4163.230.254.0/24Allowed
ip4163.230.255.30/31Allowed
exists%{i}.spf.hc4686-63.iphmx.comAllowed
includespf.protection.outlook.comAllowed
includeres.cisco.comAllowed
includespf1.formassembly.comAllowed
includespf-a.sentara.comAllowed
includespf-b.sentara.comAllowed
all—Rejected

Top-level DNS lookups: 6 of 10 allowed

Record

v=spf1 ip4:163.230.254.0/24 ip4:163.230.255.30/31 exists:%{i}.spf.hc4686-63.iphmx.com include:spf.protection.outlook.com include:res.cisco.com include:spf1.formassembly.com include:spf-a.sentara.com include:spf-b.sentara.com -all

E-mail signing (DKIM)

DKIM keys published by sentara.com under the most common selectors. Other keys may exist under selectors specific to each sending service.

SelectorLikely serviceKeyStatus
mail—RSA 2048 bitsActive

MX, SPF, DKIM and DMARC: the e-mail records

Four DNS records make a domain's e-mail work. MX says where e-mails sent to sentara.com arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from sentara.com was really sent by this domain, which protects it against spoofing.

MX

An MX (Mail Exchanger) record designates a server that receives e-mails sent to the domain. When someone writes to an @sentara.com address, their mail server queries the DNS for the domain's MX records, then delivers the message to the server they point to.

Example record

sentara.com  MX  10 mx1.sentara.com.
sentara.com  MX  20 mx2.sentara.com.

What the record contains

10, 20
Priority: the server with the lowest number is tried first. Servers with equal priority share the load.
mx1.sentara.com.
Host name of the mail server. It must point to an A or AAAA record: an IP address or an alias (CNAME) is not allowed here.
0 .
An MX "0 .", called a null MX, declares that the domain accepts no e-mail: sending servers give up at once instead of retrying.

Declaring at least two servers with different priorities avoids losing e-mails during an outage: sending servers retry for several days and fall back on the backup server. Without any MX, they try to deliver directly to the IP address of the domain.

SPF

SPF (Sender Policy Framework) is a TXT record listing the servers allowed to send e-mails on behalf of the domain. The receiving server checks that the sender is on this list. The final "all" rule says what to do with other servers: reject them (-all), flag their e-mails as suspicious (~all) or make no decision (?all).

Example record

sentara.com  TXT  "v=spf1 mx include:_spf.google.com ip4:192.0.2.10 -all"

What the record contains

v=spf1
Identifies the record as an SPF policy. It must come first.
ip4, ip6
Allows a specific IP address or an address range, for example ip4:192.0.2.0/24.
a, mx
Allows the addresses of the domain itself (A record) or those of its mail servers (MX).
include
Allows the servers of another domain, usually a sending service: include:_spf.google.com for Google Workspace.
-all, ~all
Final rule, applied to every other server. Its qualifier decides what happens to them: - rejects them, ~ flags their e-mails as suspicious, ? makes no decision, + accepts them (avoid it).

A domain must publish only one SPF record, and its evaluation cannot exceed 10 DNS lookups (include, a, mx, exists, redirect). Beyond that, mail servers treat it as invalid.

DKIM

DKIM (DomainKeys Identified Mail) signs every outgoing e-mail with a private key. The matching public key is published in a TXT record at selector._domainkey.sentara.com, so the recipient can check that the message really comes from the domain and was not altered on the way. The selector is chosen by each sending service and cannot be guessed: Dataweaz checks the most common ones (Google Workspace, Microsoft 365, Mailchimp, SendGrid…), so a key published under another selector may exist without appearing here.

Example record

google._domainkey.sentara.com  TXT  "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA…"

What the record contains

v=DKIM1
Protocol version. Optional but recommended, in which case it must come first.
k
Key algorithm: rsa, the most common, or ed25519.
p
Public key, base64-encoded. An empty value means the key has been revoked.
t
Flags: y marks a key in testing, whose failures must not be penalized; s forbids its use for subdomains.

Each sending service publishes its key under its own selector (google, selector1, k1…), which allows several keys and seamless rotation. A 2048-bit RSA key is recommended today.

DMARC

DMARC (Domain-based Message Authentication, Reporting and Conformance) builds on SPF and DKIM. Published on _dmarc.sentara.com, it tells mail servers what to do with an e-mail that fails these checks (let it through, send it to spam or reject it) and where to send reports.

Example record

_dmarc.sentara.com  TXT  "v=DMARC1; p=quarantine; rua=mailto:[email protected]; adkim=r; aspf=r"

What the record contains

v=DMARC1
Identifies the record as a DMARC policy. It must come first.
p
Policy applied to e-mails that fail the checks: none (monitoring only), quarantine (spam folder) or reject.
sp
Subdomain policy. Without it, subdomains follow the domain's policy.
rua
Address that receives daily aggregate reports about e-mails sent on behalf of the domain, whether they pass the checks or not.
ruf
Address that receives detailed failure reports, message by message. Few providers still send them.
pct
Percentage of e-mails subject to the policy, for a gradual rollout. 100 by default.
adkim, aspf
DKIM and SPF alignment: r (relaxed, a subdomain of the same domain is enough) or s (strict, the domain must be identical).

To roll out DMARC without blocking legitimate e-mails, start with p=none and an rua address, analyze the reports to find every service sending on behalf of the domain, then move to quarantine and finally to reject.

DNS records of sentara.com

IP addresses (A and AAAA)

An A record maps the domain name to an IPv4 address: the address of the server that browsers contact to display the website. The AAAA record does the same for an IPv6 address. A domain can have several of them to spread visits across several servers.

TypeIP address
A75.2.42.34
A76.223.114.36

Name servers (NS)

NS records designate the authoritative DNS servers of the domain: they answer every question about its other records (A, MX, TXT…). They are provided by the registrar, the hosting provider or a dedicated DNS service, and several servers are declared so that the domain keeps working if one of them fails.

ServerIP address
ns-1607.awsdns-08.co.uk205.251.198.71
ns-182.awsdns-22.com205.251.192.182
ns-626.awsdns-14.net205.251.194.114
ns-1354.awsdns-41.org205.251.197.74

Mail servers (MX)

MX records point to the servers that receive e-mails sent to the domain, that is to @sentara.com addresses. Each server has a priority: the one with the lowest number is tried first, the others take over if it fails. Without an MX record, the domain cannot receive e-mails.

PriorityServerIP address
10mx2.hc4686-63.iphmx.com207.54.95.93
10mx1.hc4686-63.iphmx.com207.54.85.200

TXT records

TXT records hold free text. They are used to prove ownership of the domain to online services (Google, Microsoft, Facebook…) and to publish e-mail security rules: SPF on the domain itself, DMARC on _dmarc.sentara.com.

NameContent
sentara.com00DDO0000001KLu=1TBDO000000CaSj
sentara.comfj134jkscxfvxl66kswpm1xf2lj294w6
sentara.comLmAwDixK46SeFjGUD+prtaXUsSpAT29UuVIbpn1YUHaOrmxNBuBlpP6pnDal+a8e5XAp6u1dyAIT7hipm0F2xA==
sentara.comasv=6820abc4f44b2a3ba9337fb5c56f6e7c
sentara.comnintex.606232b4527df900711a7217
sentara.comgoogle-site-verification=N82oYzFJRjtwc3ltVUJSwzzX4TEcYUSPIdwrnmShj0c
sentara.comProbely=b55bdf64-36b5-437a-8123-7ddc458cb6a7
sentara.com00D5Y000001bbRI=1TBKe000000KykI
sentara.com00D7e00000Kaxne=1TBD1000000001W
sentara.comF3C3FE408AF550B10118F65F41C12A5AE85C5D8C11B0461D5B0740013C864905
sentara.comkgdbk1d6htmq7btvnkgzz2l6dssbrsm0
sentara.comblbp4hpchlj8cmxcwg1xgbg16nf07n7q
sentara.comgoogle-gws-recovery-domain-verification=59151865
sentara.com_mzy57zti8ysr39m6azmh7lom80frj4p
sentara.comcanva-site-verification=BAzmq-I52CEm9DnZx8IjFg
sentara.comnintex.60a66bb8efb30f0067712fb4
sentara.comcisco-ci-domain-verification=6565f5b01a95bb32504f2ef759be895644784f40467ae190a4498ed42339fe67
sentara.com_cmfitc4iy11yrbfrpt0mhqd1yviqcv4
sentara.comwebexdomainverification.=d0544b33-5a3c-4824-8bff-5cab4ed6731d
sentara.comapple-domain-verification=DZrQzcH3oUOlWQNU
sentara.comdomain-verification=ad902254-67ec-17b0-50c5-25f8ad20cb1c
sentara.comv=spf1 ip4:163.230.254.0/24 ip4:163.230.255.30/31 exists:%{i}.spf.hc4686-63.iphmx.com include:spf.protection.outlook.com include:res.cisco.com include:spf1.formassembly.com include:spf-a.sentara.com include:spf-b.sentara.com -all
sentara.comatlassian-domain-verification=q4TDqK8X0/lN/OtwDaWWa6uDYhCLJ7gBwzfsbIjuyHJ1qzjuKHEAueL1rKMiFuwN
sentara.comadobe-idp-site-verification=beaa7871539f6e120f41ca320ad30d5fe7ebbd621762f175f9ed7612fc4fa403
sentara.comE6495F1757B98D3BD6F4452B5B070F3BC91E03D1E126B7B31BAAFBE78AEE6217
sentara.comonetrust-domain-verification=f0c6e3a459764ceba76fc44faadf35d5
sentara.comdocusign=3cc1ada8-7c19-4cb1-b588-90f8c3655f3d
sentara.com86528b95-7d41-462e-9f2a-2c86e2362068
sentara.comatlassian-domain-verification=lwvsFzToG1sxrZfMMWUJ8sQ/Ch1gNxjX1bgWoy9kBo7y1Rs51kGux7LYRpXck9QE
sentara.com00D0a0000027P2l=1TBVt00000002Q1
sentara.comgoogle-site-verification=IPrqzCJby2DJAJZpw76NCzdWfg24hSR3fGWjBK15D4g
sentara.com0A6D2953E74959020557E625E80F22A87EB687F039890E4A9521558AD57B7F8A
sentara.com_phmie3rul60fipoi8eefhexo0930s3f
sentara.comdomain-verification=e822dc54-1ca5-22d3-4f17-5faf1a8b19cc
sentara.comdocusign=18188241-1446-4d9d-b35b-3f109b6857f5
_dmarc.sentara.comv=DMARC1;p=reject;fo=1;rua=mailto:[email protected];ruf=mailto:[email protected]
mail._domainkey.sentara.comv=DKIM1; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxNGSZKdMlZIHl2Jjj6PYwBTyE7569XHJCO2gxGaCbyb1lP+dzCuw1mfALszZyEt6V3DHQOM1erUFJPVFpdOPJTQNCYupuJMpXowmbMPtMSOfHjkJ6K/oIJsiVM/qdeKkjOnr2dfckfvGDtKSCJDa8moKgLMjMmbMw9d8v5pEF9O6EyzUhvzoIYF7FI88Ejc/Ogq2DVnwBBDmc6ojDQEpdraf0qOKetj6kIWITu7odmYqkTlLl0xqc6OaSaajTL1k42A91+REtKyJPvJPwYFsEGl89C2S4jg4ymtU0QDvK6CfDWZhdA0W18BdVJHZVpAKUeC+r/fgh6p8B4PegY6nlwIDAQAB;

Related IP addresses

IPv4 addresses used by sentara.com: website, name servers, mail servers and senders authorized by SPF.

IP addressUsed for/24 block
75.2.42.34Website75.2.42.0/24
76.223.114.36Website76.223.114.0/24
205.251.198.71Name server ns-1607.awsdns-08.co.uk205.251.198.0/24
205.251.192.182Name server ns-182.awsdns-22.com205.251.192.0/24
205.251.194.114Name server ns-626.awsdns-14.net205.251.194.0/24
205.251.197.74Name server ns-1354.awsdns-41.org205.251.197.0/24
207.54.95.93Mail server mx2.hc4686-63.iphmx.com207.54.95.0/24
207.54.85.200Mail server mx1.hc4686-63.iphmx.com207.54.85.0/24

WHOIS of the domain sentara.com

Domain Name: SENTARA.COM
   Registry Domain ID: 5021909_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.markmonitor.com
   Registrar URL: http://www.markmonitor.com
   Updated Date: 2026-09-30T12:30:28Z
   Creation Date: 1994-04-18T04:00:00Z
   Registry Expiry Date: 2027-10-31T22:28:29Z
   Registrar: MarkMonitor Inc.
   Registrar IANA ID: 292
   Registrar Abuse Contact Email: [email protected]
   Registrar Abuse Contact Phone: +1.2086851750
   Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
   Domain Status: serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited
   Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited
   Domain Status: serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited
   Name Server: NS-1354.AWSDNS-41.ORG
   Name Server: NS-1607.AWSDNS-08.CO.UK
   Name Server: NS-182.AWSDNS-22.COM
   Name Server: NS-626.AWSDNS-14.NET
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2026-10-02T18:55:58Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

NOTICE: The expiration date displayed in this record is the date the
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registrar.  Users may consult the sponsoring registrar's Whois database to
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