polymarket.us - DNS, WHOIS, DMARC and SPF of the domain name

Summary

Registrar: Squarespace Domains II LLC
Status: clientTransferProhibited
Created on: March 17, 2021
Expires on: March 17, 2027
Name servers: logan.ns.cloudflare.com, fatima.ns.cloudflare.com
Mail servers: smtp.google.com
DMARC: Quarantine
SPF: Soft
DKIM: 3 keys found
Website: See the website

Spoofing protection (DMARC)

Quarantine

E-mails spoofing this domain are sent to spam.

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

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

Record

v=DMARC1; p=quarantine; rua=mailto:[email protected]

Authorized senders (SPF)

Soft

E-mails sent by any other server are accepted but flagged as suspicious.

SPF lists the servers allowed to send e-mails for polymarket.us.

Rule	Value	Result
include	%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email	Allowed
include	_spf.google.com	Allowed
all	—	Suspicious

Top-level DNS lookups: 2 of 10 allowed

Record

v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.google.com ~all

E-mail signing (DKIM)

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

Selector	Likely service	Key	Status
google	Google Workspace	RSA 2048 bits	Active
s1	SendGrid	RSA 2048 bits	Active
s2	SendGrid	RSA 2048 bits	Active

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 polymarket.us arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from polymarket.us 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 @polymarket.us 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

polymarket.us  MX  10 mx1.polymarket.us.
polymarket.us  MX  20 mx2.polymarket.us.

What the record contains

10, 20: Priority: the server with the lowest number is tried first. Servers with equal priority share the load.
mx1.polymarket.us.: 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

polymarket.us  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.polymarket.us, 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.polymarket.us  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.polymarket.us, 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.polymarket.us  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 polymarket.us

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.

Type	IP address
A	216.150.1.1

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.

Server	IP address
logan.ns.cloudflare.com	172.64.33.198
fatima.ns.cloudflare.com	162.159.38.188

Mail servers (MX)

MX records point to the servers that receive e-mails sent to the domain, that is to @polymarket.us 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.

Priority	Server	IP address
1	smtp.google.com	74.125.71.27

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.polymarket.us.

Name	Content
polymarket.us	google-site-verification=wnKamuuzkmbypmpa-FYYzSgyxeoGohuuyHGnLeaj93A
polymarket.us	google-site-verification=toPflpCgkWCxmNov_7CqpDF6dK145wpFTm3zMTV930U
polymarket.us	google-site-verification=cy8UwoLP6Ix3gkZRexaiPzY94WdO_xpPozDQUba6QWM
polymarket.us	google-site-verification=j-UQjfdpkcP8RtoTW-FK-VUgXH0oeHoh4EyHnyYekGI
polymarket.us	google-site-verification=7ph_MFU1fXMHtaxLdEEnB4A7-toQr_ns4X1hlVrpswI
polymarket.us	google-site-verification=hMdeAhq5Vmcrw7gWOkW57YwYw0klkHiyW3UV5IwYSAI
polymarket.us	google-site-verification=tGppRtw5ydLaJEZyM5Zr5BMBjMSJLFpGHIGnC-spS_8
polymarket.us	MS=ms44601114
polymarket.us	v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.google.com ~all
_dmarc.polymarket.us	v=DMARC1; p=quarantine; rua=mailto:[email protected]
google._domainkey.polymarket.us	v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAkh+PuDaNaGzFvgccpuC2c6OTN1Svv6cYBsNVjqvPnW+gv+yiwC+Ji7RbLYzAohdrmtk0wBJ2pLoYOH11PnZhTTjJhlTxUbbQxSAgFz2XJDyNEmU55ouSGA+/y2DDhJ1a4gSvACyNDZDqOtLDzJFAV9LR6oyx/UQ9og/Gh84bIZLCfD5nk7X2NZh31sxxgU+2JhhHIDX8g2uSVWpyPg7v/ObC2rW/x6vXNx8L62wrxt2eSwEDfsTwWRizlWsYg/pWi8/i2F2pE+7GNPuyq0vuyu/C++1dRPN2RiYwhIAHMs9hVs9bfNd/BzeeIf95HmVCZNjTnXBow42bu7QkYpYS9QIDAQAB
s1._domainkey.polymarket.us	k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA/EvDJl5BuJ8ardzYEL9DCd28y2ghA/G6BHbS7usorieh3KvHCnyp4csXqWUaRv1HzEie+VGSI8wWmK/ySNSYlLh/vac7iW/fFtmnGgt1ueFdSQ9QZQO2Ndw8B3W3uzi6kj15S4ThKoQ2FNqlGoXwGr2Gt78JK8Dus6OhKPSuzwsqW3fFbiG2rdBrwXzT67UGEalkgEZ+NCf8kAfm5fnJzAiumYOz7KbJPDGvxLszbXf4BCSLpGQINldeP4qunxB0am1RPOVbUymq1g6rilTRJtPzCDPB54cvwRfxgm3L+1nES1dIFJpFH/us6/JtC7wXgi0GT1SUCxOv/CxI+HJrKwIDAQAB
s2._domainkey.polymarket.us	k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzbxNOoYgNRUB6D9XThqEfCXUWlffH7XsSrSlfaq2ckNCxhvDg9s6ArxuznEil6oDQW3zwsjhuz4x59K+5uY+6WHI9vfoj80Fp3SO1itgwxy+/T9BMlwMSuvG1qfVZRzM3MuB6g0RE4McqBiAaCx+KV3xKe1LkTiwZ26Jt8xngeaYg79N5FvWdczDexZXd5dHhJ2yjkVTe56lmYmR4PXpmRfPA2dqLVpbd8WO/ubWarShasX7b7VqfBOjQpyJ0m9PxNJt/9ByobCUQDZ/o3IxaixH5IhtshbgAxNzgb6iJZDqgmaL49Ah4AiSW486k+xATG8aM9N28gWktSK2pd4MtwIDAQAB

Related IP addresses

IPv4 addresses used by polymarket.us: website, name servers, mail servers and senders authorized by SPF.

IP address	Used for	/24 block
216.150.1.1	Website	216.150.1.0/24
172.64.33.198	Name server logan.ns.cloudflare.com	172.64.33.0/24
162.159.38.188	Name server fatima.ns.cloudflare.com	162.159.38.0/24
74.125.71.27	Mail server smtp.google.com	74.125.71.0/24

WHOIS of the domain polymarket.us

Domain Name: polymarket.us
Registry Domain ID: D70C4545B2FDE4959A0AEA517A533B046-NSR
Registrar WHOIS Server: whois.squarespace.domains
Registrar URL: https://domains.squarespace.com
Updated Date: 2026-03-18T22:29:46Z
Creation Date: 2021-03-17T14:01:21Z
Registry Expiry Date: 2027-03-17T14:01:21Z
Registrar: Squarespace Domains II LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +1.6466935324
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Registry Registrant ID: CBCCC74323B584ED9825691AD1085932D-GDREG
Registrant Name: Engineering Polymarket
Registrant Organization: Blockratize Inc
Registrant Street: 228 park Ave south
Registrant Street:
Registrant Street:
Registrant City: New York
Registrant State/Province: NY
Registrant Postal Code: 10003
Registrant Country: US
Registrant Phone: +54.1130962146
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: [email protected]
Registrant Application Purpose: P1
Registrant Nexus Category: C21
Registry Admin ID: C7D37E64810E3405CA43731033005EBE4-GDREG
Admin Name: Engineering Polymarket
Admin Organization: Blockratize Inc
Admin Street: 228 park Ave south
Admin Street:
Admin Street:
Admin City: New York
Admin State/Province: NY
Admin Postal Code: 10003
Admin Country: US
Admin Phone: +54.1130962146
Admin Phone Ext:
Admin Fax:
Admin Fax Ext:
Admin Email: [email protected]
Admin Application Purpose: P1
Admin Nexus Category: C21
Registry Tech ID: C8765977C7B4148068257F0A6C2FAAAB7-NSR
Tech Name: Engineering Polymarket
Tech Organization: Blockratize Inc
Tech Street: 228 park Ave south
Tech Street:
Tech Street:
Tech City: New York
Tech State/Province: NY
Tech Postal Code: 10003
Tech Country: US
Tech Phone: +54.1130962146
Tech Phone Ext:
Tech Fax:
Tech Fax Ext:
Tech Email: [email protected]
Tech Application Purpose: P1
Tech Nexus Category: C21
Name Server: logan.ns.cloudflare.com
Name Server: fatima.ns.cloudflare.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2026-10-02T20:17:41Z <<<

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

.US WHOIS Complaint Tool - http://www.whoiscomplaints.us
Advanced WHOIS Instructions - http://whois.us/help.html

Registry Services, LLC, the Registry Administrator for .US, has collected this information for the WHOIS database through a .US-Accredited Registrar. This information is provided to you for informational purposes only and is designed to assist persons in determining contents of a domain name registration record in the registry database. 

Registry Services, LLC makes this information available to you "as is" and does not guarantee its accuracy. By submitting a WHOIS query, you agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data: 

(1) to allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via direct mail, electronic mail, or by telephone; 
(2) in contravention of any applicable data and privacy protection laws; or 
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Compilation, repackaging, dissemination, or other use of the WHOIS database in its entirety, or of a substantial portion thereof, is not allowed without our prior written permission. 

We reserve the right to modify or change these conditions at any time without prior or subsequent notification of any kind. By executing this query, in any manner whatsoever, you agree to abide by these terms. NOTE: FAILURE TO LOCATE A RECORD IN THE WHOIS DATABASE IS NOT INDICATIVE OF THE AVAILABILITY OF A DOMAIN NAME. All domain names are subject to certain additional domain name registration rules. For details, please visit our site at www.whois.us.
Domain Name: polymarket.us
Registry Domain ID: D70C4545B2FDE4959A0AEA517A533B046-NSR
Registrar WHOIS Server: whois.squarespace.domains
Registrar URL: https://domains2.squarespace.com
Registrar: Squarespace Domains II LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +1.646-693-5324
Reseller:
Updated Date: 2026-09-09T21:04:53.274678Z
Creation Date: 2021-03-17T14:01:21.119Z
Registrar Registration Expiration Date: 2027-03-17T14:01:21.119Z
Domain Status: client transfer prohibited http://www.icann.org/epp#client transfer prohibited
Domain Status: client delete prohibited http://www.icann.org/epp#client delete prohibited
Registry Registrant ID:
Registrant Name: Engineering Polymarket
Registrant Organization: Blockratize Inc
Registrant Street: 228 park Ave south
Registrant City: New York
Registrant State/Province: NY
Registrant Postal Code: 10003
Registrant Country: US
Registrant Phone: +54.1130962146
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: [email protected]
Registry Admin ID:
Admin Name: Engineering Polymarket
Admin Organization: Blockratize Inc
Admin Street: 228 park Ave south
Admin City: New York
Admin State/Province: NY
Admin Postal Code: 10003
Admin Country: US
Admin Phone: +54.1130962146
Admin Phone Ext:
Admin Fax:
Admin Fax Ext:
Admin Email: [email protected]
Registry Tech ID:
Tech Name: Engineering Polymarket
Tech Organization: Blockratize Inc
Tech Street: 228 park Ave south
Tech City: New York
Tech State/Province: NY
Tech Postal Code: 10003
Tech Country: US
Tech Phone: +54.1130962146
Tech Phone Ext:
Tech Fax:
Tech Fax Ext:
Tech Email: [email protected]
Name Server: fatima.ns.cloudflare.com
Name Server: logan.ns.cloudflare.com
DNSSEC: unsigned
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
The registration data available in this service is limited.  Additional data may be available at https://lookup.icann.org.
****** Last update of WHOIS database: 2026-09-09T21:04:53.274678Z

% Query time: 964 msec
% WHEN: Fri Oct 02 20:17:40 UTC 2026