PhishPin / Brands Live Phishing Data / Retail, delivery & marketplaces / Costco
Costco phishing: sites, fake domains & scam patterns
PhishPin's phishing-feed index currently lists 15 hostnames that reference Costco, across 26 reported URLs from 1 of 5 threat feeds we track. Costco ranks #176 of 579 brands we track by reported hosts. In the last 15 days, 13 newly registered domains contained or closely resembled the name.
Retail, delivery & marketplaces · rank #176 of 579 by reported hosts
Key findings for Costco
- Impersonation pressure is Elevated (37/100): Costco has more reported hosts than 68% of the 579 brands we track.
- That is 0.2× the average for retail, delivery & marketplaces (69 hosts per brand).
- The most common ending is .ca (8 hosts, 53%).
- 73% of hosts pair the brand with a bait word. The most common is “reward” (7 hosts).
- 13 lookalike domains were registered in the last 15 days.
How attackers fake Costco
These breakdowns cover all 15 matching hostnames, not only the rows listed below.
Top endings (TLDs)
Bait words next to the brand
Hostname tricks
Hosts reported in phishing feeds
The most widely reported hostnames that reference Costco, ranked by how many feeds list them and then by reported URLs. Search, filter and export all 15 rows.
| # | Hostname (defanged) | Pattern | Feeds | URLs |
|---|---|---|---|---|
| 1 | costcoservice[.]ca | service | 1 feed | 10 |
| 2 | costco-membership-reward[.]ca | reward | 1 feed | 2 |
| 3 | costco-reward-campaign[.]ca | reward | 1 feed | 2 |
| 4 | costco-annual-expenses-reward[.]ca | reward | 1 feed | 1 |
| 5 | costco-annual-reward[.]ca | reward | 1 feed | 1 |
| 6 | costco-member-reward[.]ca | reward | 1 feed | 1 |
| 7 | costco-rewards[.]ca | reward | 1 feed | 1 |
| 8 | costcomainsupport[.]com | support | 1 feed | 1 |
| 9 | costcorewardsclub[.]co | reward | 1 feed | 1 |
| 10 | costcowholesale-membershipexclusives[.]com | name in domain | 1 feed | 1 |
| 11 | interac-etransfercostco[.]com | name in domain | 1 feed | 1 |
| 12 | mail[.]interac-etransfercostco[.]com | name in domain | 1 feed | 1 |
| 13 | payments-costco[.]ca | pay | 1 feed | 1 |
| 14 | prime[.]shop-onlinecostco[.]tokyo | online | 1 feed | 1 |
| 15 | www[.]costco-survey[.]rest | name in domain | 1 feed | 1 |
Is your brand in these feeds?
Free check: email-spoofing gaps, registered lookalikes and feed listings for your own domain. About a minute, public DNS only.
New lookalike domains registered recently
Domains registered in the last 15 days that contain Costco's name, sit one character away from it or use look-alike characters. Attackers often register these days before sending the first email.
Registrations per day
Top endings of new lookalikes
Bait words in new lookalikes
| # | Domain (defanged) | Why it matched | Registered |
|---|---|---|---|
| 1 | costcowholesale-rewards6300[.]com | brand name + keywordreward | 22 Oct 2026 · 10 days ago |
| 2 | costco[.]fun | contains brand name | 28 Oct 2026 · 4 days ago |
| 3 | costcomex[.]com | contains brand name | 28 Oct 2026 · 4 days ago |
| 4 | costcowholesale[.]org | contains brand name | 25 Oct 2026 · 7 days ago |
| 5 | costcocloseouts[.]com | contains brand name | 25 Oct 2026 · 7 days ago |
| 6 | costcomembership8836[.]com | contains brand name | 25 Oct 2026 · 7 days ago |
| 7 | costcontrolone[.]site | contains brand name | 24 Oct 2026 · 8 days ago |
| 8 | costcooperations[.]net | contains brand name | 23 Oct 2026 · 9 days ago |
| 9 | costconsiderations[.]info | contains brand name | 23 Oct 2026 · 9 days ago |
| 10 | costcoremodel[.]com | contains brand name | 21 Oct 2026 · 11 days ago |
| 11 | costcokitchenremodeling[.]com | contains brand name | 21 Oct 2026 · 11 days ago |
| 12 | costcoco[.]uk | contains brand name | 19 Oct 2026 · 13 days ago |
| 13 | costcomptroller[.]com | contains brand name | 17 Oct 2026 · 15 days ago |
How Costco phishing works
Phishing against Costco follows patterns common to retail, delivery & marketplaces. Typical lures:
- An "order confirmation" or "payment declined" email for something you did not order.
- A refund, reward or survey offer that asks for your card details.
- A fake seller or buyer message that moves the chat off-platform to a payment link.
- A text about a gift card, delivery problem or account lock with a short link.
Red flags
- The order or amount does not match anything you did, and the email pushes you to call or click.
- Prices or rewards are too good to be true, and the checkout page is on a different domain.
- You are asked to pay by gift card, wire or a link sent in chat.
Real Costco domains
If the address in your browser is not one of these (or a subdomain of them), it is not Costco. The list is not exhaustive.
costco.comIf you already clicked or entered details
Contact your card issuer to cancel the card and dispute any charge, change the account password, and review saved addresses and payment methods. Use the retailer's official app or site to check any order.
Protecting a brand like Costco from lookalike domains
If you run security, brand or fraud for a company that is copied this way, this is the order that works in practice:
- Enforce DMARC. Move your policy to quarantine, then reject, so attackers cannot send mail that passes as your domain.
- Watch new registrations. Lookalikes appear daily; the earlier you see one, the sooner you can act, ideally before the first email goes out.
- Register the obvious typos and keyword variants you can afford to hold, and check which lookalikes are already registered by someone else.
- Report fast. A live fake needs a request to the registrar and host, plus a report to browser safe-browsing lists and the public feeds shown above.
- Tell your customers where you will and will not ask for logins, codes or payments.
Protect your brand from lookalike domains
Costco is one of 579 brands in this index, but attackers copy any company whose customers log in or pay. PhishPin checks your domain for registered lookalikes, email-spoofing gaps and listings in these same phishing feeds, then helps you get the fakes taken down.
Audits use public data only – we never touch your servers. Results within 24 hours.
Questions about Costco phishing
How can I tell if a message from Costco is phishing?
Check the sender and link domain first. The order or amount does not match anything you did, and the email pushes you to call or click. Prices or rewards are too good to be true, and the checkout page is on a different domain. You are asked to pay by gift card, wire or a link sent in chat. When in doubt, do not use the link: type costco.com into your browser or open the official app.
How many Costco phishing sites has PhishPin found?
As of 1 Nov 2026, 15 hostnames referencing Costco appear in the phishing feeds PhishPin indexes (26 reported URLs). These are reported hostnames, not a count of sites that are online today; many are removed quickly and some matches are coincidental.
What do fake Costco domains look like?
In our data, the most common ending for reported hosts is .ca. The brand is most often combined with the word "reward". Always read the part of the address just before the first single slash: that is the real site. Real Costco addresses end in costco.com.
What should I do if I entered my details on a fake Costco page?
Contact your card issuer to cancel the card and dispute any charge, change the account password, and review saved addresses and payment methods. Use the retailer's official app or site to check any order.
How do I report a fake Costco website or message?
Forward phishing emails to reportphishing@apwg.org, report scams at reportfraud.ftc.gov, and report the page to Google Safe Browsing. Also tell Costco through the contact options on its official website (costco.com).
Is it safe to visit the domains listed on this page?
No. They are shown defanged, with dots in brackets, so they cannot be clicked by accident. Do not type them into a browser. Listings are warnings from automated matching, and some are harmless coincidences.
How does PhishPin find lookalike domains of Costco?
We read the daily list of newly registered domains (1,050,000 domains over the last 15 days) and flag those that contain the brand name, differ by one character or swap look-alike characters. A match is a warning sign, not proof of abuse.
How can a company protect its own brand from lookalike domains like these?
Publish an enforced DMARC policy so nobody can send mail as your domain, monitor newly registered domains that resemble your name, register the obvious typo domains, and file takedown requests with the registrar, host and browser safe-browsing lists when a fake goes live. PhishPin's free brand audit checks the first three for your domain.
Other retail, delivery & marketplaces being impersonated
All retail, delivery & marketplaces brands ranked