19ch.tv 葉一のYouTube授業と無料テキスト｜19ch（塾チャンネル）
葉一の公式サイト「19ch（塾チャンネル）」。2,000本以上のYouTube授業と専用プリントを無料公開中。とある男が授業をしてみた｜小学3年〜6年の算数、中学生の数学、国語、理科、社会、英語、高校数学に対応。高校受験の対策動画や、聞くだけで覚える暗記法も。
Over the time 19ch.tv has been ranked as high as 15,560 in the world, while most of its traffic comes from Japan, where it reached as high as 24,135 position.
19ch.tv receives about 496 unique visitors and 3,472 pageviews per day. The estimated value of 19ch.tv is 65,700 USD. Each unique visitor makes about 7 pageviews on average.
19ch.tv is registered under .TV top-level domain. Check other websites in .TV zone.
At the time of the last check (June 29, 2019) 19ch.tv has an expired SSL certificate (expired on August 07, 2019).
According to Google Safe Browsing, Google Safe Search, Symantec and Web of Trust 19ch.tv is quite a safe domain.
Mobile-Friendly test indicates that 19ch.tv is well optimized for mobile and tablet devices.
Audience Geography. Where are 19ch.tv visitors located?
| Country | Rank |
|---|---|
 Japan JP | 24135 |
| Country | Percent of Pageviews |
|---|---|
| Japan JP | 100% |
| Country | Percent of Visitors |
|---|---|
| Japan JP | 100% |
Where do visitors go on 19ch.tv?
| Subdomain | Pageviews |
|---|---|
| 19ch.tv | 100% |
| Subdomain | Pageviews per User |
|---|---|
| 19ch.tv | 10 |
| Subdomain | Reach |
|---|---|
| 19ch.tv | 100% |
How popular is 19ch.tv?
| Days | Reach Rank | Reach Rank Delta | Reach per Million | Reach per Million Delta |
|---|---|---|---|---|
| 90 | 228241 | 65620 | 25 | -33.17% |
| 30 | 408261 | 217737 | 1 | -61.186% |
| Days | Pageviews Rank | Pageviews Rank Delta | Pageviews per Million | Pageviews per Million Delta | Pageviews per User | Pageviews per User Delta |
|---|---|---|---|---|---|---|
| 90 | 111280 | 46975 | 49 | -49.084% | 7 | -23.83% |
| 30 | 127339 | 29750 | 42 | -26.96% | 10 | 90% |
| Period | Global Rank | Global Rank Delta |
|---|---|---|
| past 3 months | 179728 | 57421 |
| past month | 287944 | 136864 |
We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.
Norton ConnectSafe evaluates 19ch.tv for any unsafe and insecure content. The results are critical for families with young children.
SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.
"19ch.tv" is not a phishing page.
"19ch.tv" does not install unwanted software.
"19ch.tv" does not contain harmfull applications.
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.
McAfee assesses 19ch.tv for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze 19ch.tv for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the 19ch.tv. This reputation system receives ratings from users and information from third-party sources, assesses the 19ch.tv for safety features and confirms, whether 19ch.tv is suitable for children.
| Domain | www.19ch.tv |
| Issuer | Let's Encrypt Authority X3 |
| Algorithm | RSA-SHA256 |
| Valid form | 05/09/2019 |
| Expiration | 08/07/2019 |
| Signed | Certificate is not self signed |
| Additional Domains | 19ch.tv www.19ch.tv |
Not Found
ASN ID: 31898
ASN Title: ORACLE-BMC-31898 - Oracle Corporation, US
Last Update: 02/24/2024
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#
ASNumber: 31898
ASName: ORACLE-BMC-31898
ASHandle: AS31898
RegDate: 2011-03-21
Updated: 2017-05-18
Ref: https://rdap.arin.net/registry/autnum/31898
OrgName: Oracle Corporation
OrgId: ORACLE-4
Address: 500 Oracle Parkway
Address: Attn: Domain Administrator
City: Redwood Shores
StateProv: CA
PostalCode: 94065
Country: US
RegDate: 1988-04-28
Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/ORACLE-4
OrgTechHandle: ORACL1-ARIN
OrgTechName: ORACLE NIS
OrgTechPhone: +1-650-506-2220
OrgTechEmail: domain-contact_ww_grp@oracle.com
OrgTechRef: https://rdap.arin.net/registry/entity/ORACL1-ARIN
OrgAbuseHandle: NISAM-ARIN
OrgAbuseName: Network Information Systems Abuse Management
OrgAbusePhone: +1-650-506-2220
OrgAbuseEmail: network-contact_ww_grp@oracle.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/NISAM-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#
Domain Name: 19CH.TV
Registry Domain ID: 111319370_DOMAIN_TV-VRSN
Registrar WHOIS Server: whois.rrpproxy.net
Registrar URL: http://www.key-systems.net
Updated Date: 2021-12-11T02:46:28Z
Creation Date: 2015-02-07T00:57:39Z
Registry Expiry Date: 2023-02-07T00:57:39Z
Registrar: Key-Systems GmbH
Registrar IANA ID: 269
Registrar Abuse Contact Email: abuse@key-systems.net
Registrar Abuse Contact Phone: +49.68949396850
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS1.MIXHOST.JP
Name Server: NS2.MIXHOST.JP
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2022-02-09T11:12:49Z
| Host | A Record | TTL |
|---|
| Host | MX Record | Priority | TTL |
|---|
| Host | NS Record | TTL |
|---|
| Host | TXT Record | TTL |
|---|
Last tested: 01/21/2018
| Total Resources | 152 |
| Number of Hosts | 44 |
| Static Resources | 87 |
| JavaScript Resources | 39 |
| CSS Resources | 12 |
Last tested: 05/19/2017
| Total Resources | 157 |
| Number of Hosts | 44 |
| Static Resources | 86 |
| JavaScript Resources | 40 |
| CSS Resources | 13 |
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