Sh4mefulIP Address: 149.72.115.133
Twilio SendGrid is a cloud-based Email Service Provider (ESP), or Mail Transfer Agent (MTA). It operates as a high-volume, cloud-based SMTP service to send, receive, and relay both transactional and marketing emails. These signals could be indicative of a failure during legitimate sends (through Sendgrid), or could be signal of a spam/spoof attempt using their service which is common enough we're not treating this as a confounder.
This page shows DMARC authentication failure data for this IP address. Learn more about this data.
Geolocation Information
- Country:
- US United States
- Coordinates:
- 37.751, -97.822
WHOIS Information
- Network Name:
- SENDGRID-149-72-0-0-16
- CIDR:
149.72.0.0/16- Owner:
- SendGrid, Inc.
- Org ID:
SENDG-12- Address:
- Twilio, Inc. 1801 California Street Suite 500, Denver, CO 80202
- Reverse DNS:
-
s.wrqvtpvr.outbound-mail.sendgrid.net
Last updated: 2/5/2026
Analysis
This IP was first observed on March 12, 2024 and most recently on May 23, 2025. It has been associated with 10 failed authentication events affecting 519 messages, representing moderate activity. The IP belongs to SENDGRID-149-72-0-0-16 (SendGrid, Inc.), a email delivery service with activity associated with United States.
External Reputation Lookups
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