AS1640
Thacker-Grigsby Communications
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 2 internet exchanges: Equinix Chicago, Equinix Ashburn
AS1640 — global IP footprint
Cities where AS1640 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS1640 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 76.72.204.0/22 | 55,427 | 2026-07-23 15:34:04 |
| 68.64.120.0/22 | 55,386 | 2026-07-23 15:34:04 |
| 69.57.96.0/21 | 55,375 | 2026-07-23 15:34:04 |
| 76.72.200.0/22 | 55,326 | 2026-07-23 15:34:04 |
| 68.64.124.0/24 | 55,325 | 2026-07-23 15:34:04 |
| 76.72.195.0/24 | 55,296 | 2026-07-23 15:34:04 |
| 69.57.104.0/21 | 55,292 | 2026-07-23 15:34:04 |
| 76.72.196.0/24 | 55,274 | 2026-07-23 15:34:04 |
| 76.72.198.0/23 | 55,237 | 2026-07-23 15:34:04 |
| 76.72.197.0/24 | 55,209 | 2026-07-23 15:34:04 |
| 76.72.194.0/24 | 55,184 | 2026-07-23 15:34:04 |
| 69.57.96.0/20 | 5,112 | 2026-07-23 15:33:52 |
| 76.72.192.0/20 | 5,068 | 2026-07-23 15:33:52 |
| 68.64.112.0/20 | 5,043 | 2026-07-23 15:33:52 |
| 208.56.128.0/19 | 5,007 | 2026-07-23 15:33:41 |
| 199.192.120.0/22 | 4,999 | 2026-07-23 15:33:41 |
| 199.59.84.0/22 | 4,992 | 2026-07-23 15:33:41 |
| 199.116.152.0/21 | 4,970 | 2026-07-23 15:33:41 |
Frequently Asked Questions
What is AS1640?
AS1640 is an Autonomous System Number assigned to Thacker-Grigsby Communications. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS1640 announce?
AS1640 announces 24.6K IPv4 addresses distributed across 76 routed CIDR prefixes. The network is registered in United States.
Who operates AS1640?
AS1640 is operated by Thacker-Grigsby Communications. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS1640 registered in?
AS1640 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
