Autonomous System details

AS21547

FirstLight Fiber, Inc. · firstlight.net

United States

BitTorrent

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AS21547 – FirstLight Fiber, Inc.

Field	Value
Country	United States
Website	firstlight.net
Hosted domains	987
IPv4 addresses	72,960
IPv6 addresses	158,459,951,805,987,519,074,612,019,200
ASN type	Hosting
Registry	arin
Allocated	25 years ago on May 21, 2001
Updated	7 years ago on Jun 10, 2019

Netblock	Company	Num of IPs
64.140.192.0/18	FirstLight Fiber, Inc.	16,384
64.140.224.0/19	FirstLight Fiber, Inc.	8,192
66.186.160.0/19	FirstLight Fiber, Inc.	8,192
66.231.192.0/19	FirstLight Fiber, Inc.	8,192
69.49.128.0/19	FirstLight Fiber, Inc.	8,192
72.12.64.0/19	FirstLight Fiber, Inc.	8,192
72.55.224.0/19	FirstLight Fiber, Inc.	8,192
69.168.0.0/20	FirstLight Fiber, Inc.	4,096
74.220.224.0/20	FirstLight Fiber, Inc.	4,096
63.127.192.0/21	WorldPath Internet Services	2,048
208.0.176.0/21	WorldPath Internet Services	2,048
208.3.240.0/21	WorldPath Internet Services	2,048
66.231.220.0/22	FirstLight Fiber, Inc.	1,024
69.49.140.0/23	FirstLight Fiber, Inc.	512
72.12.76.0/23	FirstLight Fiber, Inc.	512
72.12.94.0/23	FirstLight Fiber, Inc.	512
72.55.248.0/23	FirstLight Fiber, Inc.	512
72.55.254.0/23	FirstLight Fiber, Inc.	512
198.212.226.0/23	Concord Hospital	512
64.140.199.0/24	FirstLight Fiber, Inc.	256
64.140.224.0/24	FirstLight Fiber, Inc.	256
64.140.225.0/24	FirstLight Fiber, Inc.	256
64.140.234.0/24	FirstLight Fiber, Inc.	256
64.140.246.0/24	FirstLight Fiber, Inc.	256
66.186.162.0/24	FirstLight Fiber, Inc.	256
66.186.163.0/24	FirstLight Fiber, Inc.	256
66.186.171.0/24	FirstLight Fiber, Inc.	256
66.186.173.0/24	FirstLight Fiber, Inc.	256
66.186.176.0/24	FirstLight Fiber, Inc.	256
66.186.184.0/24	FirstLight Fiber, Inc.	256
66.186.188.0/24	FirstLight Fiber, Inc.	256
66.231.192.0/24	RedZone Wireless	256
66.231.207.0/24	Oxford Networks	256
66.231.208.0/24	FirstLight Fiber, Inc.	256
66.231.214.0/24	FirstLight Fiber, Inc.	256
66.231.215.0/24	FirstLight Fiber, Inc.	256
66.231.217.0/24	FirstLight Fiber, Inc.	256
66.231.219.0/24	FirstLight Fiber, Inc.	256
69.49.128.0/24	FirstLight Fiber, Inc.	256
69.49.129.0/24	FirstLight Fiber, Inc.	256
69.49.133.0/24	Auto Europe	256
69.49.144.0/24	FirstLight Fiber, Inc.	256
69.49.146.0/24	Unitel Inc	256
69.49.148.0/24	FirstLight Fiber, Inc.	256
69.49.153.0/24	FirstLight Fiber, Inc.	256
72.12.75.0/24	MEMIC	256
72.12.78.0/24	FirstLight Fiber, Inc.	256
72.12.79.0/24	FirstLight Fiber, Inc.	256
72.12.80.0/24	FirstLight Fiber, Inc.	256
72.12.84.0/24	FirstLight Fiber, Inc.	256
72.12.87.0/24	FirstLight Fiber, Inc.	256
72.12.91.0/24	FirstLight Fiber, Inc.	256
72.12.92.0/24	FirstLight Fiber, Inc.	256
72.55.247.0/24	FirstLight Fiber, Inc.	256
74.220.236.0/24	FirstLight Fiber, Inc.	256
140.165.50.0/24	Teledyne Brown Engineering	256
198.212.225.0/24	Concord Hospital	256
198.212.230.0/24	Concord Hospital	256

Netblock	Company
2001:4940::/32	FirstLight Fiber, Inc.
2604:3f00::/32	FirstLight Fiber, Inc.
2001:4940:2001::/48	FirstLight Fiber, Inc.
2001:4940:2006::/48	FirstLight Fiber, Inc.
2001:4940:2007::/48	FirstLight Fiber, Inc.

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WHOIS Details

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                                                ASHandle:       AS21547
                                                OrgID:          AS21547
                                                ASName:         AS21547
                                                ASNumber:       AS21547
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 987 domain names hosted across 263 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
66.186.172.183	█████████	44
64.140.253.44	██████████	40
63.127.194.195	█████████	35
64.140.253.45	██████████	34
66.186.172.185	██████████	30
69.49.151.180	███████	28
66.186.172.182	██████████	25
63.127.195.68	██████████	19
66.186.172.181	██████████	17
64.140.214.77	██████████	15

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Peers

There are 6 peers for this ASN.

Peers	Name
AS13536	FirstLight Fiber, Inc.
AS18803	Tyler Technologies, Inc.
AS36501	GARMIN INTERNATIONAL INC.
AS36787	Hearst-Argyle Television, Inc.
AS36823	Martin's Point HealthCare
AS395342	Exeter Hospital

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Upstreams

There is 1 peer for this ASN.

upstreams	Name
AS13536	FirstLight Fiber, Inc.

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Downstreams

There are 5 downstreams for this ASN.

Downstreams	Name
AS18803	Tyler Technologies, Inc.
AS36501	GARMIN INTERNATIONAL INC.
AS36787	Hearst-Argyle Television, Inc.
AS36823	Martin's Point HealthCare
AS395342	Exeter Hospital

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ASN API & Database

Pingable IPs

219 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
66.231.207.194	AS21547 FirstLight Fiber, Inc.	`2.59ms` from Boston, US
69.49.155.1	AS21547 FirstLight Fiber, Inc.	`6.65ms` from Boston, US
69.49.154.122	AS21547 FirstLight Fiber, Inc.	`8.48ms` from Boston, US
2001:4940:4001::1	AS21547 FirstLight Fiber, Inc.	`11.55ms` from New York City, US
66.186.168.1	AS21547 FirstLight Fiber, Inc.	`7.46ms` from Boston, US
64.140.226.177	AS21547 FirstLight Fiber, Inc.	`2.97ms` from Boston, US
66.186.172.161	AS21547 FirstLight Fiber, Inc.	`1.57ms` from Boston, US
64.140.240.54	AS21547 FirstLight Fiber, Inc.	`2.64ms` from Boston, US
69.49.157.9	AS21547 FirstLight Fiber, Inc.	`1.93ms` from Boston, US
64.140.197.97	AS21547 FirstLight Fiber, Inc.	`1.86ms` from Boston, US
66.231.202.113	AS21547 FirstLight Fiber, Inc.	`1.92ms` from Boston, US
69.168.9.254	AS21547 FirstLight Fiber, Inc.	`1.68ms` from Boston, US
2604:3f00:62::2	AS21547 FirstLight Fiber, Inc.	`10.68ms` from New York City, US
74.220.227.173	AS21547 FirstLight Fiber, Inc.	`2.83ms` from Boston, US
64.140.200.245	AS21547 FirstLight Fiber, Inc.	`1.91ms` from Boston, US
72.55.241.117	AS21547 FirstLight Fiber, Inc.	`2.91ms` from Boston, US
64.140.255.193	AS21547 FirstLight Fiber, Inc.	`6.79ms` from Boston, US
74.220.234.26	AS21547 FirstLight Fiber, Inc.	`1.65ms` from Boston, US
69.49.146.7	AS21547 FirstLight Fiber, Inc.	`8.05ms` from Boston, US
64.140.215.3	AS21547 FirstLight Fiber, Inc.	`6.85ms` from Boston, US
66.186.191.185	AS21547 FirstLight Fiber, Inc.	`2.99ms` from Boston, US
74.220.233.117	AS21547 FirstLight Fiber, Inc.	`1.93ms` from Boston, US
64.140.248.58	AS21547 FirstLight Fiber, Inc.	`6.80ms` from Boston, US
74.220.225.113	AS21547 FirstLight Fiber, Inc.	`1.97ms` from Boston, US
64.140.203.49	AS21547 FirstLight Fiber, Inc.	`1.95ms` from Boston, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
41.69.131.171	AS24835 Vodafone Data	`14.51ms` from Cairo, EG
105.242.172.123	AS36994 Vodacom	`2.26ms` from Cape Town, ZA
64.111.20.107	AS33302 Data102	`1.56ms` from Denver, US
176.213.126.107	AS52207 JSC ER-Telecom Holding	`3.84ms` from Moscow, RU
198.180.141.203	AS31822 City University of New York	`4.42ms` from New York City, US
49.192.175.251	AS4804 Microplex PTY LTD	`3.21ms` from Perth, AU
27.220.34.91	AS4837 CHINA UNICOM China169 Backbone	`10.81ms` from Qingdao, CN
114.73.57.203	AS4804 Microplex PTY LTD	`6.38ms` from Sydney, AU
60.93.209.235	AS17676 SoftBank Corp.	`2.92ms` from Tokyo, JP
184.150.169.139	AS577 Bell Canada	`0.45ms` from Winnipeg, CA
23.204.219.171	AS16625 Akamai Technologies, Inc.	`0.18ms` from Ashburn, US
170.210.126.11	AS61476 Universidad Nacional de La Pampa	`11.00ms` from Buenos Aires, AR
93.197.233.219	AS3320 Deutsche Telekom AG	`10.61ms` from Frankfurt am Main, DE
134.175.61.187	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.95ms` from Guangzhou, CN
34.101.27.155	AS139190 Google Asia Pacific Pte. Ltd.	`0.51ms` from Jakarta, ID
79.24.111.203	AS3269 Telecom Italia S.p.A.	`5.50ms` from Milan, IT
185.185.9.123	AS34659 Keyyo SA	`1.45ms` from Paris, FR
201.137.244.235	AS8151 UNINET	`3.70ms` from Santiago de Queretaro, MX
14.56.1.251	AS4766 Korea Telecom	`1.85ms` from Seoul, KR
99.225.84.59	AS812 Rogers Communications Canada Inc.	`3.57ms` from Toronto, CA
188.23.107.219	AS8447 A1 Telekom Austria AG	`1.39ms` from Vienna, AT
116.255.128.43	AS4837 CHINA UNICOM China169 Backbone	`0.26ms` from Zhengzhou, CN
184.75.228.235	AS22709 North State Telephone, LLC	`8.33ms` from Atlanta, US
200.3.163.11	AS14080 Telmex Colombia S.A.	`1.55ms` from Bogota, CO
138.253.254.107	AS786 Jisc Services Limited	`4.26ms` from Chester, GB

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 -f5 -m17 66.231.210.87

traceroute to 66.231.210.87 (66.231.210.87): 17 hops max, 52 byte packets

5 [AS6939] 72.52.92.205 9.376 ms

6 *

7 *

8 [AS6939] 184.104.196.82 100.047 ms

9 *

10 [AS13536] 66.152.97.2 102.726 ms

11 [AS13536] 66.152.97.21 107.266 ms

12 [AS13536] 66.152.98.250 117.47 ms

13 [AS13536] 66.152.98.198 109.565 ms

14 [AS21547] 72.12.70.66 110.636 ms

15 *

16 *

17 *

Measurement taken from

IPinfo ProbeNet in Belgrade, RS

On February 16th 2026

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS21547 at robtex.

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