What percentage of phone numbers are VoIP?

Across every phone number validated on the 1Lookup platform in the last 30 days (21 September to 20 October 2026, UTC), 1.8% came back as VoIP lines. That is the share among numbers our customers chose to check, mostly lead lists and signup forms, not the share of all phone numbers.

What share of phone numbers on a list are invalid or unreachable?

5% of the numbers validated on 1Lookup in the last 30 days were invalid or unreachable. Lists collected months ago run far higher than lists validated at the point of capture, so a single list can sit well above or below this.

How many email addresses are undeliverable?

6.7% of the email addresses verified on 1Lookup in the last 30 days were undeliverable or risky, and 0.1% were disposable (throwaway) addresses. Both are shares of addresses our customers verified, not of all email addresses.

What share of IP addresses are proxies or VPNs?

13.9% of the IP addresses looked up on 1Lookup in the last 30 days came from a proxy, VPN exit or datacenter. IP lookups skew toward signup and checkout traffic that customers already suspected, so this runs above the share on ordinary web traffic.

Where do these numbers come from?

From the 1Lookup platform's own database: the classification each completed lookup returned, counted per product over a rolling window of complete UTC days. Only counts and percentages are published. No lookup input, customer or organisation is exposed, a product needs at least 500 lookups from at least 5 organisations to be reported, and any bucket under 25 lookups is folded into 'other'.

Live platform data, refreshed hourly

Contact Data Quality on the 1Lookup Platform

Every lookup that runs on 1Lookup returns a classification: mobile or VoIP, deliverable or not, residential or proxy. This page is the sum of those classifications over the last 30 complete days. It is the one statistic on this site nobody can copy, because it comes from what our customers actually checked.

Every completed lookup on 1Lookup, 21 September to 20 October 2026 (UTC), the last 30 complete days.

Phone numbers

What the platform saw across every phone validation and spam check. VoIP share is the number to watch: a VoIP line is where throwaway signups and fake leads live, and it is invisible to a format check.

Phone line types

2,137,394 phone numbers validated

1.8% came back as VoIP lines.

Mobile85.3%1,823,375
Landline12.1%259,560
VoIP1.8%39,539
Unclassified0.6%12,307
Toll free0.1%2,613

Phone validation API

Phone number status

2,137,394 phone numbers validated

5% were invalid or unreachable.

Active94.9%2,027,665
Unreachable4.4%93,520
Invalid0.6%12,280
Unclassified0.1%2,613
Valid0.1%1,316

Phone validation API

Spam risk

5,251 numbers checked for spam reputation

3.3% carried a high or critical spam risk.

Low96.8%5,081
Critical2.8%145
High0.5%25

Phone spam check

Email addresses

Deliverability is the bounce risk; provider type shows how much of a list is disposable; address type shows how many are role inboxes (info@, sales@) that no individual reads.

Email deliverability

249,076 email addresses verified

6.7% were undeliverable or risky.

Deliverable92.3%229,915
Risky3.6%9,054
Undeliverable3.1%7,746
Unclassified0.9%2,198
Temporary0.1%163

Email validation API

Email provider type

249,076 email addresses verified

0.1% were disposable (throwaway) addresses.

Company domain80.7%200,898
Free mailbox provider19.3%48,022
Disposable0.1%156

Email validation API

Email address type

249,076 email addresses verified

4.8% were role addresses (info@, sales@, support@).

Named business address71.1%177,100
Free mailbox provider19.3%48,001
Unclassified4.8%12,072
Role address4.8%11,903

Email validation API

IP addresses

Connection type separates residential and mobile traffic from proxies, VPN exits and datacenters.

IP connection type

121,656 IP addresses looked up

13.9% came from a proxy, VPN exit or datacenter.

Unclassified30.2%36,715
Mobile network29.8%36,197
Residential ISP25.9%31,565
Datacenter8%9,689
Proxy or VPN5.9%7,128
Other0.3%362

IP lookup API

How this was measured

Source. The classification field of every completed, non-test lookup in the 1Lookup database, grouped per product over the last 30 complete UTC days. Today's partial day is never included, so the same window reads the same all day. The platform is 1Lookup.io, part of the Momentum Labs group of companies and the data partner for its sister brands (Prymatica, Emailchaser, VoiceDrop and ExpressNumber), whose own verification traffic is part of what is counted here.
Privacy floors. A product is reported only with at least 500 lookups from at least 5 distinct organisations in the window; a bucket under 25 lookups is folded into “other”. A missing block means the floor was not cleared, not that the value was zero.
What it is not. A random sample of anything. Customers verify the lists and signups they are worried about, so every share here runs above the rate you would see on a clean first-party list and below the rate on an old purchased one.
Reproduce it. The same payload is public JSON at app.1lookup.io/api/v1/public/daily-signals?window=30 (also 7), and the per-day series is at ?date=YYYY-MM-DD.

Questions this page answers

What percentage of phone numbers are VoIP?: Across every phone number validated on the 1Lookup platform in the last 30 days (21 September to 20 October 2026, UTC), 1.8% came back as VoIP lines. That is the share among numbers our customers chose to check, mostly lead lists and signup forms, not the share of all phone numbers.
What share of phone numbers on a list are invalid or unreachable?: 5% of the numbers validated on 1Lookup in the last 30 days were invalid or unreachable. Lists collected months ago run far higher than lists validated at the point of capture, so a single list can sit well above or below this.
How many email addresses are undeliverable?: 6.7% of the email addresses verified on 1Lookup in the last 30 days were undeliverable or risky, and 0.1% were disposable (throwaway) addresses. Both are shares of addresses our customers verified, not of all email addresses.
What share of IP addresses are proxies or VPNs?: 13.9% of the IP addresses looked up on 1Lookup in the last 30 days came from a proxy, VPN exit or datacenter. IP lookups skew toward signup and checkout traffic that customers already suspected, so this runs above the share on ordinary web traffic.
Where do these numbers come from?: From the 1Lookup platform's own database: the classification each completed lookup returned, counted per product over a rolling window of complete UTC days. Only counts and percentages are published. No lookup input, customer or organisation is exposed, a product needs at least 500 lookups from at least 5 organisations to be reported, and any bucket under 25 lookups is folded into 'other'.

Check your own list against these

The fastest way to know where your data sits is to run a sample through the same checks. The free tools take one value at a time with no signup: VoIP checker, email verifier, VPN and proxy detection. A whole list goes through the phone validation API or a CSV upload in the app, and every number is scored on the Four-Signal Phone Check.